<?php
/**
 * Base class for elFinder volume.
 * Provide 2 layers:
 *  1. Public API (commands)
 *  2. abstract fs API
 *
 * All abstract methods begin with "_"
 *
 * @author Dmitry (dio) Levashov
 * @author Troex Nevelin
 * @author Alexey Sukhotin
 **/
abstract class elFinderVolumeDriver {
	
	/**
	 * Net mount key
	 *
	 * @var string
	 **/
	public $netMountKey = '';
	
	/**
	 * Request args
	 * $_POST or $_GET values
	 * 
	 * @var array
	 */
	protected $ARGS = array();
	
	/**
	 * Driver id
	 * Must be started from letter and contains [a-z0-9]
	 * Used as part of volume id
	 *
	 * @var string
	 **/
	protected $driverId = 'a';
	
	/**
	 * Volume id - used as prefix for files hashes
	 *
	 * @var string
	 **/
	protected $id = '';
	
	/**
	 * Flag - volume "mounted" and available
	 *
	 * @var bool
	 **/
	protected $mounted = false;
	
	/**
	 * Root directory path
	 *
	 * @var string
	 **/
	protected $root = '';
	
	/**
	 * Root basename | alias
	 *
	 * @var string
	 **/
	protected $rootName = '';
	
	/**
	 * Default directory to open
	 *
	 * @var string
	 **/
	protected $startPath = '';
	
	/**
	 * Base URL
	 *
	 * @var string
	 **/
	protected $URL = '';
	
	/**
	 * Thumbnails dir path
	 *
	 * @var string
	 **/
	protected $tmbPath = '';
	
	/**
	 * Is thumbnails dir writable
	 *
	 * @var bool
	 **/
	protected $tmbPathWritable = false;
	
	/**
	 * Thumbnails base URL
	 *
	 * @var string
	 **/
	protected $tmbURL = '';
	
	/**
	 * Thumbnails size in px
	 *
	 * @var int
	 **/
	protected $tmbSize = 48;
	
	/**
	 * Image manipulation lib name
	 * auto|imagick|gd|convert
	 *
	 * @var string
	 **/
	protected $imgLib = 'auto';
	
	/**
	 * Video to Image converter
	 * 
	 * @var array
	 */
	protected $imgConverter = array();
	
	/**
	 * Library to crypt files name
	 *
	 * @var string
	 **/
	protected $cryptLib = '';
	
	/**
	 * Archivers config
	 *
	 * @var array
	 **/
	protected $archivers = array(
		'create'  => array(),
		'extract' => array()
	);
	
	/**
	 * Server character encoding
	 *
	 * @var string or null
	 **/
	protected $encoding = null;
	
	/**
	 * How many subdirs levels return for tree
	 *
	 * @var int
	 **/
	protected $treeDeep = 1;
	
	/**
	 * Errors from last failed action
	 *
	 * @var array
	 **/
	protected $error = array();
	
	/**
	 * Today 24:00 timestamp
	 *
	 * @var int
	 **/
	protected $today = 0;
	
	/**
	 * Yesterday 24:00 timestamp
	 *
	 * @var int
	 **/
	protected $yesterday = 0;
	
	/**
	 * Force make dirctory on extract
	 *
	 * @var int
	 **/
	protected $extractToNewdir = 'auto';
	
	/**
	 * Object configuration
	 *
	 * @var array
	 **/
	protected $options = array(
		'id'              => '',
		// revision id of root directory that uses for caching control of root stat
		'rootRev'         => '',
		// driver type it uses volume root's CSS class name. e.g. 'group' -> Adds 'elfinder-group' to CSS class name.
		'type'            => '',
		// root directory path
		'path'            => '',
		// Folder hash value on elFinder to be the parent of this volume
		'phash'           => '',
		// open this path on initial request instead of root path
		'startPath'       => '',
		// how many subdirs levels return per request
		'treeDeep'        => 1,
		// root url, not set to disable sending URL to client (replacement for old "fileURL" option)
		'URL'             => '',
		// directory link url to own manager url with folder hash (`true`, `false` or default `'auto'`: URL is empty then `true` else `false`)
		'dirUrlOwn'     => 'auto',
		// directory separator. required by client to show paths correctly
		'separator'       => DIRECTORY_SEPARATOR,
		// Server character encoding (default is '': UTF-8)
		'encoding'        => '',
		// for convert character encoding (default is '': Not change locale)
		'locale'          => '',
		// URL of volume icon (16x16 pixel image file)
		'icon'            => '',
		// CSS Class of volume root in tree
		'rootCssClass'    => '',
		// Items to disable session caching
		'noSessionCache'  => array(),
		// enable i18n folder name that convert name to elFinderInstance.messages['folder_'+name]
		'i18nFolderName'  => false,
		// Search timeout (sec)
		'searchTimeout'   => 30,
		// Search exclusion directory regex pattern (require demiliter e.g. '#/path/to/exclude_directory#i')
		'searchExDirReg'  => '',
		// library to crypt/uncrypt files names (not implemented)
		'cryptLib'        => '',
		// how to detect files mimetypes. (auto/internal/finfo/mime_content_type)
		'mimeDetect'      => 'auto',
		// mime.types file path (for mimeDetect==internal)
		'mimefile'        => '',
		// Static extension/MIME of general server side scripts to security issues
		'staticMineMap'   => array(
			'php:*'                        => 'text/x-php',
			'php3:*'                       => 'text/x-php',
			'php4:*'                       => 'text/x-php',
			'php5:*'                       => 'text/x-php',
			'phtml:*'                      => 'text/x-php',
			'cgi:*'                        => 'text/x-httpd-cgi',
			'pl:*'                         => 'text/x-perl',
			'asp:*'                        => 'text/x-asap',
			'aspx:*'                       => 'text/x-asap',
			'py:*'                         => 'text/x-python',
			'rb:*'                         => 'text/x-ruby',
			'jsp:*'                        => 'text/x-jsp'
		),
		// mime type normalize map : Array '[ext]:[detected mime type]' => '[normalized mime]'
		'mimeMap'         => array(
			'md:application/x-genesis-rom' => 'text/x-markdown',
			'md:text/plain'                => 'text/x-markdown',
			'markdown:text/plain'          => 'text/x-markdown',
			'css:text/x-asm'               => 'text/css',
			'ico:image/vnd.microsoft.icon' => 'image/x-icon',
			'csv:text/plain'               => 'text/csv',
			'm4a:video/mp4'                => 'audio/mp4',
			'oga:application/ogg'          => 'audio/ogg',
			'ogv:application/ogg'          => 'video/ogg',
			'zip:application/x-zip'        => 'application/zip'
		),
		// An option to add MimeMap to the `mimeMap` option
		// Array '[ext]:[detected mime type]' => '[normalized mime]'
		'additionalMimeMap' => array(),
		// MIME regex of send HTTP header "Content-Disposition: inline"
		// '.' is allow inline of all of MIME types
		// '$^' is not allow inline of all of MIME types
		'dispInlineRegex' => '^(?:(?:image|text)|application/x-shockwave-flash$)',
		// directory for thumbnails
		'tmbPath'         => '.tmb',
		// mode to create thumbnails dir
		'tmbPathMode'     => 0777,
		// thumbnails dir URL. Set it if store thumbnails outside root directory
		'tmbURL'          => '',
		// thumbnails size (px)
		'tmbSize'         => 48,
		// thumbnails crop (true - crop, false - scale image to fit thumbnail size)
		'tmbCrop'         => true,
		// thumbnails background color (hex #rrggbb or 'transparent')
		'tmbBgColor'      => 'transparent',
		// image rotate fallback background color (hex #rrggbb)
		'bgColorFb'       => '#ffffff',
		// image manipulations library
		'imgLib'          => 'auto',
		// Fallback self image to thumbnail (nothing imgLib)
		'tmbFbSelf'       => true,
		// Video to Image converters ['TYPE or MIME' => ['func' => function($file){ /* Converts $file to Image */ return true; }, 'maxlen' => (int)TransferLength]]
		'imgConverter'    => array(),
		// Max length of transfer to image converter
		'tmbVideoConvLen' => 10000000,
		// Captre point seccond
		'tmbVideoConvSec' => 6,
		// Resource path of fallback icon images defailt: php/resouces
		'resourcePath'    => '',
		// Jpeg image saveing quality
		'jpgQuality'      => 100,
		// on paste file -  if true - old file will be replaced with new one, if false new file get name - original_name-number.ext
		'copyOverwrite'   => true,
		// if true - join new and old directories content on paste
		'copyJoin'        => true,
		// on upload -  if true - old file will be replaced with new one, if false new file get name - original_name-number.ext
		'uploadOverwrite' => true,
		// mimetypes allowed to upload
		'uploadAllow'     => array(),
		// mimetypes not allowed to upload
		'uploadDeny'      => array(),
		// order to proccess uploadAllow and uploadDeny options
		'uploadOrder'     => array('deny', 'allow'),
		// maximum upload file size. NOTE - this is size for every uploaded files
		'uploadMaxSize'   => 0,
		// maximum number of chunked upload connection. `-1` to disable chunked upload
		'uploadMaxConn'   => 3,
		// files dates format
		'dateFormat'      => 'j M Y H:i',
		// files time format
		'timeFormat'      => 'H:i',
		// if true - every folder will be check for children folders, -1 - every folder will be check asynchronously, false -  all folders will be marked as having subfolders
		'checkSubfolders' => true, // true, false or -1
		// allow to copy from this volume to other ones?
		'copyFrom'        => true,
		// allow to copy from other volumes to this one?
		'copyTo'          => true,
		// cmd duplicate suffix format e.g. '_%s_' to without spaces
		'duplicateSuffix' => ' %s ',
		// unique name numbar format e.g. '(%d)' to (1), (2)...
		'uniqueNumFormat' => '%d',
		// list of commands disabled on this root
		'disabled'        => array(),
		// enable file owner, group & mode info, `false` to inactivate "chmod" command.
		'statOwner'       => false,
		// allow exec chmod of read-only files
		'allowChmodReadOnly' => false,
		// regexp or function name to validate new file name
		'acceptedName'    => '/^[^\.].*/', //<-- DONT touch this! Use constructor options to overwrite it!
		// function/class method to control files permissions
		'accessControl'   => null,
		// some data required by access control
		'accessControlData' => null,
		// default permissions.
		'defaults'     => array(
			'read'   => true,
			'write'  => true,
			'locked' => false,
			'hidden' => false
		),
		// files attributes
		'attributes'   => array(),
		// max allowed archive files size (0 - no limit)
		'maxArcFilesSize' => 0,
		// Allowed archive's mimetypes to create. Leave empty for all available types.
		'archiveMimes' => array(),
		// Manual config for archivers. See example below. Leave empty for auto detect
		'archivers'    => array(),
		// plugin settings
		'plugin'       => array(),
		// Is support parent directory time stamp update on add|remove|rename item
		// Default `null` is auto detection that is LocalFileSystem, FTP or Dropbox are `true`
		'syncChkAsTs'  => null,
		// Long pooling sync checker function for syncChkAsTs is true
		// Calls with args (TARGET DIRCTORY PATH, STAND-BY(sec), OLD TIMESTAMP, VOLUME DRIVER INSTANCE, ELFINDER INSTANCE)
		// This function must return the following values. Changed: New Timestamp or Same: Old Timestamp or Error: false
		// Default `null` is try use elFinderVolumeLocalFileSystem::localFileSystemInotify() on LocalFileSystem driver
		// another driver use elFinder stat() checker
		'syncCheckFunc'=> null,
		// Long polling sync stand-by time (sec)
		'plStandby'    => 30,
		// Sleep time (sec) for elFinder stat() checker (syncChkAsTs is true)
		'tsPlSleep'    => 10,
		// Sleep time (sec) for elFinder ls() checker (syncChkAsTs is false)
		'lsPlSleep'    => 30,
		// Client side sync interval minimum (ms)
		// Default `null` is auto set to ('tsPlSleep' or 'lsPlSleep') * 1000
		// `0` to disable auto sync
		'syncMinMs'    => null,
		// required to fix bug on macos
		'utf8fix'      => false,
		 //                           й                 ё              Й               Ё              O         A
		'utf8patterns' => array("\u0438\u0306", "\u0435\u0308", "\u0418\u0306", "\u0415\u0308", "\u00d8A", "\u030a"),
		'utf8replace'  => array("\u0439",        "\u0451",       "\u0419",       "\u0401",       "\u00d8", "\u00c5")
	);

	/**
	 * Defaults permissions
	 *
	 * @var array
	 **/
	protected $defaults = array(
		'read'   => true,
		'write'  => true,
		'locked' => false,
		'hidden' => false
	);
	
	/**
	 * Access control function/class
	 *
	 * @var mixed
	 **/
	protected $attributes = array();
	
	/**
	 * Access control function/class
	 *
	 * @var mixed
	 **/
	protected $access = null;
	
	/**
	 * Mime types allowed to upload
	 *
	 * @var array
	 **/
	protected $uploadAllow = array();
	
	/**
	 * Mime types denied to upload
	 *
	 * @var array
	 **/
	protected $uploadDeny = array();
	
	/**
	 * Order to validate uploadAllow and uploadDeny
	 *
	 * @var array
	 **/
	protected $uploadOrder = array();
	
	/**
	 * Maximum allowed upload file size.
	 * Set as number or string with unit - "10M", "500K", "1G"
	 *
	 * @var int|string
	 **/
	protected $uploadMaxSize = 0;
	
	/**
	 * Mimetype detect method
	 *
	 * @var string
	 **/
	protected $mimeDetect = 'auto';
	
	/**
	 * Flag - mimetypes from externail file was loaded
	 *
	 * @var bool
	 **/
	private static $mimetypesLoaded = false;
	
	/**
	 * Finfo object for mimeDetect == 'finfo'
	 *
	 * @var object
	 **/
	protected $finfo = null;
	
	/**
	 * List of disabled client's commands
	 *
	 * @var array
	 **/
	protected $disabled = array();
	
	/**
	 * default extensions/mimetypes for mimeDetect == 'internal' 
	 *
	 * @var array
	 **/
	protected static $mimetypes = array(
		// applications
		'ai'    => 'application/postscript',
		'eps'   => 'application/postscript',
		'exe'   => 'application/x-executable',
		'doc'   => 'application/msword',
		'dot'   => 'application/msword',
		'xls'   => 'application/vnd.ms-excel',
		'xlt'   => 'application/vnd.ms-excel',
		'xla'   => 'application/vnd.ms-excel',
		'ppt'   => 'application/vnd.ms-powerpoint',
		'pps'   => 'application/vnd.ms-powerpoint',
		'pdf'   => 'application/pdf',
		'xml'   => 'application/xml',
		'swf'   => 'application/x-shockwave-flash',
		'torrent' => 'application/x-bittorrent',
		'jar'   => 'application/x-jar',
		// open office (finfo detect as application/zip)
		'odt'   => 'application/vnd.oasis.opendocument.text',
		'ott'   => 'application/vnd.oasis.opendocument.text-template',
		'oth'   => 'application/vnd.oasis.opendocument.text-web',
		'odm'   => 'application/vnd.oasis.opendocument.text-master',
		'odg'   => 'application/vnd.oasis.opendocument.graphics',
		'otg'   => 'application/vnd.oasis.opendocument.graphics-template',
		'odp'   => 'application/vnd.oasis.opendocument.presentation',
		'otp'   => 'application/vnd.oasis.opendocument.presentation-template',
		'ods'   => 'application/vnd.oasis.opendocument.spreadsheet',
		'ots'   => 'application/vnd.oasis.opendocument.spreadsheet-template',
		'odc'   => 'application/vnd.oasis.opendocument.chart',
		'odf'   => 'application/vnd.oasis.opendocument.formula',
		'odb'   => 'application/vnd.oasis.opendocument.database',
		'odi'   => 'application/vnd.oasis.opendocument.image',
		'oxt'   => 'application/vnd.openofficeorg.extension',
		// MS office 2007 (finfo detect as application/zip)
		'docx'  => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
		'docm'  => 'application/vnd.ms-word.document.macroEnabled.12',
		'dotx'  => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
		'dotm'  => 'application/vnd.ms-word.template.macroEnabled.12',
		'xlsx'  => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
		'xlsm'  => 'application/vnd.ms-excel.sheet.macroEnabled.12',
		'xltx'  => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
		'xltm'  => 'application/vnd.ms-excel.template.macroEnabled.12',
		'xlsb'  => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
		'xlam'  => 'application/vnd.ms-excel.addin.macroEnabled.12',
		'pptx'  => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
		'pptm'  => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
		'ppsx'  => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
		'ppsm'  => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
		'potx'  => 'application/vnd.openxmlformats-officedocument.presentationml.template',
		'potm'  => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
		'ppam'  => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
		'sldx'  => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
		'sldm'  => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
		// archives
		'gz'    => 'application/x-gzip',
		'tgz'   => 'application/x-gzip',
		'bz'    => 'application/x-bzip2',
		'bz2'   => 'application/x-bzip2',
		'tbz'   => 'application/x-bzip2',
		'xz'    => 'application/x-xz',
		'zip'   => 'application/zip',
		'rar'   => 'application/x-rar',
		'tar'   => 'application/x-tar',
		'7z'    => 'application/x-7z-compressed',
		// texts
		'txt'   => 'text/plain',
		'php'   => 'text/x-php',
		'html'  => 'text/html',
		'htm'   => 'text/html',
		'js'    => 'text/javascript',
		'css'   => 'text/css',
		'rtf'   => 'text/rtf',
		'rtfd'  => 'text/rtfd',
		'py'    => 'text/x-python',
		'java'  => 'text/x-java-source',
		'rb'    => 'text/x-ruby',
		'sh'    => 'text/x-shellscript',
		'pl'    => 'text/x-perl',
		//'xml'   => 'text/xml',
		'sql'   => 'text/x-sql',
		'c'     => 'text/x-csrc',
		'h'     => 'text/x-chdr',
		'cpp'   => 'text/x-c++src',
		'hh'    => 'text/x-c++hdr',
		'log'   => 'text/plain',
		'csv'   => 'text/csv',
		'md'    => 'text/x-markdown',
		'markdown' => 'text/x-markdown',
		// images
		'bmp'   => 'image/x-ms-bmp',
		'jpg'   => 'image/jpeg',
		'jpeg'  => 'image/jpeg',
		'gif'   => 'image/gif',
		'png'   => 'image/png',
		'tif'   => 'image/tiff',
		'tiff'  => 'image/tiff',
		'tga'   => 'image/x-targa',
		'psd'   => 'image/vnd.adobe.photoshop',
		//'ai'    => 'image/vnd.adobe.photoshop',
		'xbm'   => 'image/xbm',
		'pxm'   => 'image/pxm',
		//audio
		'mp3'   => 'audio/mpeg',
		'mid'   => 'audio/midi',
		'ogg'   => 'audio/ogg',
		'oga'   => 'audio/ogg',
		'm4a'   => 'audio/mp4',
		'wav'   => 'audio/wav',
		'wma'   => 'audio/x-ms-wma',
		// video
		'avi'   => 'video/x-msvideo',
		'dv'    => 'video/x-dv',
		'mp4'   => 'video/mp4',
		'mpeg'  => 'video/mpeg',
		'mpg'   => 'video/mpeg',
		'mov'   => 'video/quicktime',
		'wm'    => 'video/x-ms-wmv',
		'flv'   => 'video/x-flv',
		'mkv'   => 'video/x-matroska',
		'webm'  => 'video/webm',
		'ogv'   => 'video/ogg',
		'ogm'   => 'video/ogg'
		);
	
	/**
	 * Directory separator - required by client
	 *
	 * @var string
	 **/
	protected $separator = DIRECTORY_SEPARATOR;
	
	/**
	 * System Root path (Unix like: '/', Windows: '\', 'C:\' or 'D:\'...)
	 *
	 * @var string
	 **/
	protected $systemRoot = DIRECTORY_SEPARATOR;
	
	/**
	 * Mimetypes allowed to display
	 *
	 * @var array
	 **/
	protected $onlyMimes = array();
	
	/**
	 * Store files moved or overwrited files info
	 *
	 * @var array
	 **/
	protected $removed = array();
	
	/**
	 * Store files added files info
	 *
	 * @var array
	 **/
	protected $added = array();
	
	/**
	 * Cache storage
	 *
	 * @var array
	 **/
	protected $cache = array();
	
	/**
	 * Cache by folders
	 *
	 * @var array
	 **/
	protected $dirsCache = array();
	
	/**
	 * You should use `$this->sessionCache['subdirs']` instead
	 * 
	 * @var array
	 * @deprecated
	 */
	protected $subdirsCache = array();
	
	/**
	 * This volume session cache
	 * 
	 * @var array
	 */
	protected $sessionCache;
	
	/**
	 * Session caching item list
	 * 
	 * @var array
	 */
	protected $sessionCaching = array('rootstat' => true, 'subdirs' => true);
	
	/**
	 * elFinder session wrapper object
	 * 
	 * @var elFinderSessionInterface
	 */
	protected $session;
	
	/**
	 * Search start time
	 * 
	 * @var int
	 */
	protected $searchStart;
	
	/**
	 * Current query word on doSearch
	 *
	 * @var string
	 **/
	protected $doSearchCurrentQuery = array();
	
	/**
	 * Is root modified (for clear root stat cache)
	 * 
	 * @var bool
	 */
	protected $rootModified = false;
	
	/**
	 * Is disable of command `url`
	 * 
	 * @var string
	 */
	protected $disabledGetUrl = false;
	
	/*********************************************************************/
	/*                            INITIALIZATION                         */
	/*********************************************************************/
	
	/**
	 * Prepare driver before mount volume.
	 * Return true if volume is ready.
	 *
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function init() {
		return true;
	}	
		
	/**
	 * Configure after successfull mount.
	 * By default set thumbnails path and image manipulation library.
	 *
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	protected function configure() {
		// set thumbnails path
		$path = $this->options['tmbPath'];
		if ($path) {
			if (!file_exists($path)) {
				if (mkdir($path)) {
					chmod($path, $this->options['tmbPathMode']);
				} else {
					$path = '';
				}
			} 
			
			if (is_dir($path) && is_readable($path)) {
				$this->tmbPath = $path;
				$this->tmbPathWritable = is_writable($path);
			}
		}
		// set resouce path
		if (! is_dir($this->options['resourcePath'])) {
			$this->options['resourcePath'] = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'resources';
		}

		// set image manipulation library
		$type = preg_match('/^(imagick|gd|convert|auto)$/i', $this->options['imgLib'])
			? strtolower($this->options['imgLib'])
			: 'auto';

		$imgLibFallback = extension_loaded('imagick')? 'imagick' : (function_exists('gd_info')? 'gd' : '');
		if (($type === 'imagick' || $type === 'auto') && extension_loaded('imagick')) {
			$this->imgLib = 'imagick';
		} else if (($type === 'gd' || $type === 'auto') && function_exists('gd_info')) {
			$this->imgLib = 'gd';
		} else {
			$convertCache = 'imgLibConvert';
			if (($convertCmd = $this->session->get($convertCache, false)) !== false) {
				$this->imgLib = $convertCmd;
			} else {
				$this->imgLib = ($this->procExec('convert -version') === 0)? 'convert' : '';
				$this->session->set($convertCache, $this->imgLib);
			}
		}
		if ($type !== 'auto' && $this->imgLib === '') {
			// fallback
			$this->imgLib = extension_loaded('imagick')? 'imagick' : (function_exists('gd_info')? 'gd' : '');
		}
		
		// check video to img converter
		if (! empty($this->options['imgConverter']) && is_array($this->options['imgConverter'])) {
			foreach($this->options['imgConverter'] as $_type => $_converter) {
				if (isset($_converter['func'])) {
					$this->imgConverter[strtolower($_type)] = $_converter;
				}
			}
		}
		if (! isset($this->imgConverter['video'])) {
			$videoLibCache = 'videoLib';
			if (($videoLibCmd = $this->session->get($videoLibCache, false)) === false) {
				$videoLibCmd = ($this->procExec('ffmpeg -version') === 0)? 'ffmpeg' : '';
				$this->session->set($videoLibCache, $videoLibCmd);
			}
			if ($videoLibCmd) {
				$this->imgConverter['video'] = array(
					'func' => array($this, $videoLibCmd . 'ToImg'),
					'maxlen' => $this->options['tmbVideoConvLen']
				);
			}
		}
		
		// check archivers
		if (empty($this->archivers['create'])) {
			$this->disabled[] ='archive';
		}
		if (empty($this->archivers['extract'])) {
			$this->disabled[] ='extract';
		}
		$_arc = $this->getArchivers();
		if (empty($_arc['create'])) {
			$this->disabled[] ='zipdl';
		}
		
		// check 'statOwner' for command `chmod`
		if (empty($this->options['statOwner'])) {
			$this->disabled[] ='chmod';
		}
		
		// check 'mimeMap'
		if (!is_array($this->options['mimeMap'])) {
			$this->options['mimeMap'] = array();
		}
		if (is_array($this->options['staticMineMap']) && $this->options['staticMineMap']) {
			$this->options['mimeMap'] = array_merge($this->options['mimeMap'], $this->options['staticMineMap']);
		}
		if (is_array($this->options['additionalMimeMap']) && $this->options['additionalMimeMap']) {
			$this->options['mimeMap'] = array_merge($this->options['mimeMap'], $this->options['additionalMimeMap']);
		}
		
		// check 'url' in disabled commands
		if (in_array('url', $this->disabled)) {
			$this->disabledGetUrl = true;
		}
	}
	
	/**
	 * @deprecated
	 */
	protected function sessionRestart() {
		$this->sessionCache = $this->session->start()->get($this->id, array());
		return true;
	}
	
	/*********************************************************************/
	/*                              PUBLIC API                           */
	/*********************************************************************/
	
	/**
	 * Return driver id. Used as a part of volume id.
	 *
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	public function driverId() {
		return $this->driverId;
	}
	
	/**
	 * Return volume id
	 *
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	public function id() {
		return $this->id;
	}
	
	/**
	 * Assign elFinder session wrapper object
	 * 
	 * @param  $session  elFinderSessionInterface
	 */
	public function setSession($session) {
		$this->session = $session;
	}
	
	/**
	 * Save session cache data
	 * Calls this function before umount this volume on elFinder::exec()
	 * 
	 * @return void
	 */
	public function saveSessionCache() {
		$this->session->set($this->id, $this->sessionCache);
	}
	
	/**
	 * Return debug info for client
	 *
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	public function debug() {
		return array(
			'id'         => $this->id(),
			'name'       => strtolower(substr(get_class($this), strlen('elfinderdriver'))),
			'mimeDetect' => $this->mimeDetect,
			'imgLib'     => $this->imgLib
		);
	}

	/**
	 * chmod a file or folder
	 *
	 * @param  string   $hash    file or folder hash to chmod
	 * @param  string   $mode    octal string representing new permissions
	 * @return array|false
	 * @author David Bartle
	 **/
	public function chmod($hash, $mode) {
		if ($this->commandDisabled('chmod')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}

		if (!($file = $this->file($hash))) {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}

		if (!$this->options['allowChmodReadOnly']) {
			if (!$this->attr($this->decode($hash), 'write', null, ($file['mime'] === 'directory'))) {
				return $this->setError(elFinder::ERROR_PERM_DENIED, $file['name']);
			}
		}

		$path = $this->decode($hash);
		$write = $file['write'];

		if ($this->convEncOut(!$this->_chmod($this->convEncIn($path), $mode))) {
			return $this->setError(elFinder::ERROR_PERM_DENIED, $file['name']);
		}

		$this->clearcache();
		if ($path == $this->root) {
			$this->rootModified = true;
		}

		if ($file = $this->stat($path)) {
			$files = array($file);
			if ($file['mime'] === 'directory' && $write !== $file['write']) {
				foreach ($this->getScandir($path) as $stat) {
					if ($this->mimeAccepted($stat['mime'])) {
						$files[] = $stat;
					}
				}
			}
			return $files;
		} else {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}
	}
	
	/**
	 * stat a file or folder for elFinder cmd exec
	 *
	 * @param  string   $hash    file or folder hash to chmod
	 * @return array
	 * @author Naoki Sawada
	 **/
	public function fstat($hash) {
		$path = $this->decode($hash);
		return $this->stat($path);
	}
	
	/**
	 * Clear PHP stat cache & all of inner stat caches
	 * 
	 */
	public function clearstatcache() {
		clearstatcache();
		$this->clearcache();
	}
	
	/**
	 * Clear inner stat caches for target hash
	 * 
	 * @param string $hash
	 */
	public function clearcaches($hash = null) {
		if ($hash === null) {
			$this->clearcache();
		} else {
			$path = $this->decode($hash);
			unset($this->cache[$path], $this->dirsCache[$path]);
		}
	}

	/**
	 * "Mount" volume.
	 * Return true if volume available for read or write,
	 * false - otherwise
	 *
	 * @param array $opts
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 * @author Alexey Sukhotin
	 */
	public function mount(array $opts) {
		$this->options = array_merge($this->options, $opts);
		
		if (!isset($this->options['path']) || $this->options['path'] === '') {
			return $this->setError('Path undefined.');
		}
		
		if (! $this->session) {
			return $this->setError('Session wrapper dose not set. Need to `$volume->setSession(elFinderSessionInterface);` before mount.');
		}
		if (! ($this->session instanceof elFinderSessionInterface)) {
			return $this->setError('Session wrapper instance must be "elFinderSessionInterface".');
		}
		
		$this->id = $this->driverId.(!empty($this->options['id']) ? $this->options['id'] : elFinder::$volumesCnt++).'_';
		$this->root = $this->normpathCE($this->options['path']);
		$this->separator = isset($this->options['separator']) ? $this->options['separator'] : DIRECTORY_SEPARATOR;
		$this->systemRoot = isset($this->options['systemRoot']) ? $this->options['systemRoot'] : $this->separator;
		
		// set server encoding
		if (!empty($this->options['encoding']) && strtoupper($this->options['encoding']) !== 'UTF-8') {
			$this->encoding = $this->options['encoding'];
		} else {
			$this->encoding = null;
		}
		
		// set ARGS
		$this->ARGS = $_SERVER['REQUEST_METHOD'] === 'POST'? $_POST : $_GET;
		
		$argInit = !empty($this->ARGS['init']);
		
		// session cache
		if ($argInit) {
			$this->session->set($this->id, array());
		}
		$this->sessionCache = $this->session->get($this->id, array());
		
		// default file attribute
		$this->defaults = array(
			'read'    => isset($this->options['defaults']['read'])  ? !!$this->options['defaults']['read']  : true,
			'write'   => isset($this->options['defaults']['write']) ? !!$this->options['defaults']['write'] : true,
			'locked'  => isset($this->options['defaults']['locked']) ? !!$this->options['defaults']['locked'] : false,
			'hidden'  => isset($this->options['defaults']['hidden']) ? !!$this->options['defaults']['hidden'] : false
		);

		// root attributes
		$this->attributes[] = array(
			'pattern' => '~^'.preg_quote($this->separator).'$~',
			'locked'  => true,
			'hidden'  => false
		);
		// set files attributes
		if (!empty($this->options['attributes']) && is_array($this->options['attributes'])) {
			
			foreach ($this->options['attributes'] as $a) {
				// attributes must contain pattern and at least one rule
				if (!empty($a['pattern']) || count($a) > 1) {
					$this->attributes[] = $a;
				}
			}
		}

		if (!empty($this->options['accessControl']) && is_callable($this->options['accessControl'])) {
			$this->access = $this->options['accessControl'];
		}
		
		$this->today     = mktime(0,0,0, date('m'), date('d'), date('Y'));
		$this->yesterday = $this->today-86400;
		
		if (!$this->init()) {
			return false;
		}
		
		// check some options is arrays
		$this->uploadAllow = isset($this->options['uploadAllow']) && is_array($this->options['uploadAllow'])
			? $this->options['uploadAllow']
			: array();
			
		$this->uploadDeny = isset($this->options['uploadDeny']) && is_array($this->options['uploadDeny'])
			? $this->options['uploadDeny']
			: array();
		
		$this->options['uiCmdMap'] = (isset($this->options['uiCmdMap']) && is_array($this->options['uiCmdMap']))
			? $this->options['uiCmdMap']
			: array();

		if (is_string($this->options['uploadOrder'])) { // telephat_mode on, compatibility with 1.x
			$parts = explode(',', isset($this->options['uploadOrder']) ? $this->options['uploadOrder'] : 'deny,allow');
			$this->uploadOrder = array(trim($parts[0]), trim($parts[1]));
		} else { // telephat_mode off
			$this->uploadOrder = ! empty($this->options['uploadOrder'])? $this->options['uploadOrder'] : array('deny', 'allow');
		}
			
		if (!empty($this->options['uploadMaxSize'])) {
			$size = ''.$this->options['uploadMaxSize'];
			$unit = strtolower(substr($size, strlen($size) - 1));
			$n = 1;
			switch ($unit) {
				case 'k':
					$n = 1024;
					break;
				case 'm':
					$n = 1048576;
					break;
				case 'g':
					$n = 1073741824;
			}
			$this->uploadMaxSize = intval($size)*$n;
		}
		// Set maximum to PHP_INT_MAX
		if (!defined('PHP_INT_MAX')) {
			define('PHP_INT_MAX', 2147483647);
		}
		if ($this->uploadMaxSize < 1 || $this->uploadMaxSize > PHP_INT_MAX) {
			$this->uploadMaxSize = PHP_INT_MAX;
		}
		
		$this->disabled = isset($this->options['disabled']) && is_array($this->options['disabled'])
			? array_values(array_diff($this->options['disabled'], array('open'))) // 'open' is required
			: array();
		
		$this->cryptLib   = $this->options['cryptLib'];
		$this->mimeDetect = $this->options['mimeDetect'];

		// find available mimetype detect method
		$type = strtolower($this->options['mimeDetect']);
		$type = preg_match('/^(finfo|mime_content_type|internal|auto)$/i', $type) ? $type : 'auto';
		$regexp = '/text\/x\-(php|c\+\+)/';
	
		if (($type == 'finfo' || $type == 'auto') 
		&& class_exists('finfo', false)) {
			$tmpFileInfo = explode(';', finfo_file(finfo_open(FILEINFO_MIME), __FILE__));
		} else {
			$tmpFileInfo = false;
		}
	
		$type = 'internal';
		if ($tmpFileInfo && preg_match($regexp, array_shift($tmpFileInfo))) {
			$type = 'finfo';
			$this->finfo = finfo_open(FILEINFO_MIME);
		} elseif (($type == 'mime_content_type' || $type == 'auto') && function_exists('mime_content_type')) {
			$_mimetypes = explode(';', mime_content_type(__FILE__));
			if (preg_match($regexp, array_shift($_mimetypes))) {
				$type = 'mime_content_type';
			}
		}
		$this->mimeDetect = $type;

		// load mimes from external file for mimeDetect == 'internal'
		// based on Alexey Sukhotin idea and patch: http://elrte.org/redmine/issues/163
		// file must be in file directory or in parent one 
		if ($this->mimeDetect == 'internal' && !self::$mimetypesLoaded) {
			self::$mimetypesLoaded = true;
			$this->mimeDetect = 'internal';
			$file = false;
			if (!empty($this->options['mimefile']) && file_exists($this->options['mimefile'])) {
				$file = $this->options['mimefile'];
			} elseif (elFinder::$defaultMimefile && file_exists(elFinder::$defaultMimefile)) {
				$file = elFinder::$defaultMimefile;
			} elseif (file_exists(dirname(__FILE__).DIRECTORY_SEPARATOR.'mime.types')) {
				$file = dirname(__FILE__).DIRECTORY_SEPARATOR.'mime.types';
			} elseif (file_exists(dirname(dirname(__FILE__)).DIRECTORY_SEPARATOR.'mime.types')) {
				$file = dirname(dirname(__FILE__)).DIRECTORY_SEPARATOR.'mime.types';
			}

			if ($file && file_exists($file)) {
				$mimecf = file($file);

				foreach ($mimecf as $line_num => $line) {
					if (!preg_match('/^\s*#/', $line)) {
						$mime = preg_split('/\s+/', $line, -1, PREG_SPLIT_NO_EMPTY);
						for ($i = 1, $size = count($mime); $i < $size ; $i++) {
							if (!isset(self::$mimetypes[$mime[$i]])) {
								self::$mimetypes[$mime[$i]] = $mime[0];
							}
						}
					}
				}
			}
		}

		$this->rootName = empty($this->options['alias']) ? $this->basenameCE($this->root) : $this->options['alias'];

		// This get's triggered if $this->root == '/' and alias is empty.
		// Maybe modify _basename instead?
		if ($this->rootName === '') $this->rootName = $this->separator;

		$root = $this->stat($this->root);
		
		if (!$root) {
			return $this->setError('Root folder does not exist.');
		}
		if (!$root['read'] && !$root['write']) {
			return $this->setError('Root folder has not read and write permissions.');
		}
		
		if ($root['read']) {
			if ($argInit) {
				// check startPath - path to open by default instead of root
				$startPath = $this->options['startPath']? $this->normpathCE($this->options['startPath']) : '';
				if ($startPath) {
					$start = $this->stat($startPath);
					if (!empty($start)
					&& $start['mime'] == 'directory'
					&& $start['read']
					&& empty($start['hidden'])
					&& $this->inpathCE($startPath, $this->root)) {
						$this->startPath = $startPath;
						if (substr($this->startPath, -1, 1) == $this->options['separator']) {
							$this->startPath = substr($this->startPath, 0, -1);
						}
					}
				}
			}
		} else {
			$this->options['URL']     = '';
			$this->options['tmbURL']  = '';
			$this->options['tmbPath'] = '';
			// read only volume
			array_unshift($this->attributes, array(
				'pattern' => '/.*/',
				'read'    => false
			));
		}
		$this->treeDeep = $this->options['treeDeep'] > 0 ? (int)$this->options['treeDeep'] : 1;
		$this->tmbSize  = $this->options['tmbSize'] > 0 ? (int)$this->options['tmbSize'] : 48;
		$this->URL      = $this->options['URL'];
		if ($this->URL && preg_match("|[^/?&=]$|", $this->URL)) {
			$this->URL .= '/';
		}
		if (strtolower($this->options['dirUrlOwn']) === 'auto') {
			$this->options['dirUrlOwn'] = $this->URL? false : true;
		} else {
			$this->options['dirUrlOwn'] = (bool)$this->options['dirUrlOwn'];
		}

		$this->tmbURL   = !empty($this->options['tmbURL']) ? $this->options['tmbURL'] : '';
		if ($this->tmbURL && $this->tmbURL !== 'self' && preg_match("|[^/?&=]$|", $this->tmbURL)) {
			$this->tmbURL .= '/';
		}
		
		$this->nameValidator = !empty($this->options['acceptedName']) && (is_string($this->options['acceptedName']) || is_callable($this->options['acceptedName']))
			? $this->options['acceptedName']
			: '';

		$this->_checkArchivers();
		// manual control archive types to create
		if (!empty($this->options['archiveMimes']) && is_array($this->options['archiveMimes'])) {
			foreach ($this->archivers['create'] as $mime => $v) {
				if (!in_array($mime, $this->options['archiveMimes'])) {
					unset($this->archivers['create'][$mime]);
				}
			}
		}
		
		// manualy add archivers
		if (!empty($this->options['archivers']['create']) && is_array($this->options['archivers']['create'])) {
			foreach ($this->options['archivers']['create'] as $mime => $conf) {
				if (strpos($mime, 'application/') === 0 
				&& !empty($conf['cmd']) 
				&& isset($conf['argc']) 
				&& !empty($conf['ext'])
				&& !isset($this->archivers['create'][$mime])) {
					$this->archivers['create'][$mime] = $conf;
				}
			}
		}
		
		if (!empty($this->options['archivers']['extract']) && is_array($this->options['archivers']['extract'])) {
			foreach ($this->options['archivers']['extract'] as $mime => $conf) {
				if (strpos($mime, 'application/') === 0
				&& !empty($conf['cmd']) 
				&& isset($conf['argc']) 
				&& !empty($conf['ext'])
				&& !isset($this->archivers['extract'][$mime])) {
					$this->archivers['extract'][$mime] = $conf;
				}
			}
		}
		
		if (! empty($this->options['noSessionCache']) && is_array($this->options['noSessionCache'])) {
			foreach($this->options['noSessionCache'] as $_key) {
				$this->sessionCaching[$_key] = false;
				unset($this->sessionCache[$_key]);
			}
		}
		if ($this->sessionCaching['subdirs']) {
			if (! isset($this->sessionCache['subdirs'])) {
				$this->sessionCache['subdirs'] = array();
			}
		}
		

		$this->configure();
		
		// Normarize disabled (array_merge`for type array of JSON)
		$this->disabled = array_values(array_unique($this->disabled));
		
		// fix sync interval
		if ($this->options['syncMinMs'] !== 0) {
			$this->options['syncMinMs'] = max($this->options[$this->options['syncChkAsTs']? 'tsPlSleep' : 'lsPlSleep'] * 1000, intval($this->options['syncMinMs']));
		}

		// to update options cache
		$this->updateCache($this->root, $root);

		return $this->mounted = true;
	}
	
	/**
	 * Some "unmount" stuffs - may be required by virtual fs
	 *
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	public function umount() {
	}
	
	/**
	 * Remove session cache of this volume
	 * 
	 */
	public function clearSessionCache() {
		$this->sessionCache = array();
	}
	
	/**
	 * Return error message from last failed action
	 *
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	public function error() {
		return $this->error;
	}
	
	/**
	 * Return is uploadable that given file name 
	 *
	 * @param  string  $name  file name
	 * @param  bool    $allowUnknown
	 * @return bool
	 * @author Naoki Sawada
	 **/
	public function isUploadableByName($name, $allowUnknown = false) {
		$mimeByName = $this->mimetype($name, true);
		return (($allowUnknown && $mimeByName === 'unknown') || $this->allowPutMime($mimeByName));
	}
	
	/**
	 * Return Extention/MIME Table (elFinderVolumeDriver::$mimetypes)
	 * 
	 * @return array
	 * @author Naoki Sawada
	 */
	public function getMimeTable() {
		// load mime.types
		! elFinderVolumeDriver::$mimetypesLoaded && elFinderVolumeDriver::mimetypeInternalDetect();
		return elFinderVolumeDriver::$mimetypes;
	}
	
	/**
	 * Return file extention detected by MIME type
	 * 
	 * @param  string  $mime    MIME type
	 * @param  string  $suffix  Additional suffix
	 * @return string
	 * @author Naoki Sawada
	 */
	public function getExtentionByMime($mime, $suffix = '') {
		static $extTable = null;
		
		if (is_null($extTable)) {
			$extTable = array_flip(array_unique($this->getMimeTable()));
			foreach(array_keys($this->options['mimeMap']) as $pair) {
				list($ext, $_mime) = explode(':', $pair);
				if ($_mime !== '*' && ! isset($extTable[$_mime])) {
					$extTable[$_mime] = $ext;
				}
			}
		}
		
		if ($mime && isset($extTable[$mime])) {
			return $suffix? ($extTable[$mime] . $suffix) : $extTable[$mime];
		}
		return '';
	}
	
	/**
	 * Set mimetypes allowed to display to client
	 *
	 * @param  array  $mimes
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	public function setMimesFilter($mimes) {
		if (is_array($mimes)) {
			$this->onlyMimes = $mimes;
		}
	}
	
	/**
	 * Return root folder hash
	 *
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	public function root() {
		return $this->encode($this->root);
	}

	/**
	 * Return target path hash
	 *
	 * @param  string $path
	 * @param  string $name
	 * @author Naoki Sawada
	 * @return string
	 */
	public function getHash($path, $name = '') {
		if ($name !== '') {
			$path = $this->joinPathCE($path, $name);
		}
		return $this->encode($path);
	}
	
	/**
	 * Return decoded path of target hash
	 * This method do not check the stat of target
	 * Use method `realpath()` to do check of the stat of target
	 *
	 * @param  string $hash
	 * @author Naoki Sawada
	 * @return string
	 */
	public function getPath($hash) {
		return $this->decode($hash);
	}
	
	/**
	 * Return root or startPath hash
	 *
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	public function defaultPath() {
		return $this->encode($this->startPath ? $this->startPath : $this->root);
	}

	/**
	 * Return volume options required by client:
	 *
	 * @param $hash
	 * @return array
	 * @author Dmitry (dio) Levashov
	 */
	public function options($hash) {
		$create = $createext = array();
		if (isset($this->archivers['create']) && is_array($this->archivers['create'])) {
			foreach($this->archivers['create'] as $m => $v) {
				$create[] = $m;
				$createext[$m] = $v['ext'];
			}
		}
		$opts = array(
			'path'            => $hash? $this->path($hash) : '',
			'url'             => $this->URL,
			'tmbUrl'          => (! $this->imgLib && $this->options['tmbFbSelf'])? 'self' : $this->tmbURL,
			'disabled'        => $this->disabled,
			'separator'       => $this->separator,
			'copyOverwrite'   => intval($this->options['copyOverwrite']),
			'uploadOverwrite' => intval($this->options['uploadOverwrite']),
			'uploadMaxSize'   => intval($this->uploadMaxSize),
			'uploadMaxConn'   => intval($this->options['uploadMaxConn']),
			'uploadMime'      => array(
				'firstOrder' => isset($this->uploadOrder[0])? $this->uploadOrder[0] : 'deny',
				'allow'      => $this->uploadAllow,
				'deny'       => $this->uploadDeny
			),
			'dispInlineRegex' => $this->options['dispInlineRegex'],
			'jpgQuality'      => intval($this->options['jpgQuality']),
			'archivers'       => array(
				'create'    => $create,
				'extract'   => isset($this->archivers['extract']) && is_array($this->archivers['extract']) ? array_keys($this->archivers['extract']) : array(),
				'createext' => $createext
			),
			'uiCmdMap'        => (isset($this->options['uiCmdMap']) && is_array($this->options['uiCmdMap']))? $this->options['uiCmdMap'] : array(),
			'syncChkAsTs'     => intval($this->options['syncChkAsTs']),
			'syncMinMs'       => intval($this->options['syncMinMs']),
			'i18nFolderName'  => intval($this->options['i18nFolderName']),
			'tmbCrop'         => intval($this->options['tmbCrop'])
		);
		if ($hash === null) {
			// call from getRootStatExtra()
			if (! empty($this->options['icon'])) {
				$opts['icon'] = $this->options['icon'];
			}
			if (! empty($this->options['rootCssClass'])) {
				$opts['csscls'] = $this->options['rootCssClass'];
			}
			if (isset($this->options['netkey'])) {
				$opts['netkey'] = $this->options['netkey'];
			}
		}
		return $opts;
	}
	
	/**
	 * Get option value of this volume
	 * 
	 * @param string $name  target option name
	 * @return NULL|mixed   target option value
	 * @author Naoki Sawada
	 */
	public function getOption($name) {
		return isset($this->options[$name])? $this->options[$name] : null;
	}
	
	/**
	 * Get plugin values of this options
	 * 
	 * @param string $name  Plugin name
	 * @return NULL|array   Plugin values
	 * @author Naoki Sawada
	 */
	public function getOptionsPlugin($name = '') {
		if ($name) {
			return isset($this->options['plugin'][$name])? $this->options['plugin'][$name] : array();
		} else {
			return $this->options['plugin'];
		}
	}
	
	/**
	 * Return true if command disabled in options
	 *
	 * @param  string  $cmd  command name
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	public function commandDisabled($cmd) {
		return in_array($cmd, $this->disabled);
	}
	
	/**
	 * Return true if mime is required mimes list
	 *
	 * @param  string     $mime   mime type to check
	 * @param  array      $mimes  allowed mime types list or not set to use client mimes list
	 * @param  bool|null  $empty  what to return on empty list
	 * @return bool|null
	 * @author Dmitry (dio) Levashov
	 * @author Troex Nevelin
	 **/
	public function mimeAccepted($mime, $mimes = null, $empty = true) {
		$mimes = is_array($mimes) ? $mimes : $this->onlyMimes;
		if (empty($mimes)) {
			return $empty;
		}
		return $mime == 'directory'
			|| in_array('all', $mimes)
			|| in_array('All', $mimes)
			|| in_array($mime, $mimes)
			|| in_array(substr($mime, 0, strpos($mime, '/')), $mimes);
	}
	
	/**
	 * Return true if voume is readable.
	 *
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	public function isReadable() {
		$stat = $this->stat($this->root);
		return $stat['read'];
	}
	
	/**
	 * Return true if copy from this volume allowed
	 *
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	public function copyFromAllowed() {
		return !!$this->options['copyFrom'];
	}
	
	/**
	 * Return file path related to root with convert encoging
	 *
	 * @param  string   $hash  file hash
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	public function path($hash) {
		return $this->convEncOut($this->_path($this->convEncIn($this->decode($hash))));
	}
	
	/**
	 * Return file real path if file exists
	 *
	 * @param  string  $hash  file hash
	 * @return string | false
	 * @author Dmitry (dio) Levashov
	 **/
	public function realpath($hash) {
		$path = $this->decode($hash);
		return $this->stat($path) ? $path : false;
	}
	
	/**
	 * Return list of moved/overwrited files
	 *
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	public function removed() {
		if ($this->removed) {
			$unsetSubdir = isset($this->sessionCache['subdirs'])? true : false;
			foreach($this->removed as $item) {
				if ($item['mime'] === 'directory') {
					$path = $this->decode($item['hash']);
					if ($unsetSubdir) {
						unset($this->sessionCache['subdirs'][$path]);
					}
					if ($item['phash'] !== '') {
						$parent = $this->decode($item['phash']);
						unset($this->cache[$parent]);
						if ($unsetSubdir) {
							unset($this->sessionCache['subdirs'][$parent]);
						}
					}
				}
			}
		}
		return $this->removed;
	}
	
	/**
	 * Return list of added files
	 *
	 * @deprecated
	 * @return array
	 * @author Naoki Sawada
	 **/
	public function added() {
		return $this->added;
	}
	
	/**
	 * Clean removed files list
	 *
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	public function resetRemoved() {
		$this->resetResultStat();
	}
	
	/**
	 * Clean added/removed files list
	 *
	 * @return void
	 **/
	public function resetResultStat() {
		$this->removed = array();
		$this->added = array();
	}
	
	/**
	 * Return file/dir hash or first founded child hash with required attr == $val
	 *
	 * @param  string   $hash  file hash
	 * @param  string   $attr  attribute name
	 * @param  bool     $val   attribute value
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function closest($hash, $attr, $val) {
		return ($path = $this->closestByAttr($this->decode($hash), $attr, $val)) ? $this->encode($path) : false;
	}

	/**
	 * Return file info or false on error
	 *
	 * @param  string $hash file hash
	 * @return array|false
	 * @internal param bool $realpath add realpath field to file info
	 * @author Dmitry (dio) Levashov
	 */
	public function file($hash) {
		$file = $this->stat($this->decode($hash));
		
		return ($file) ? $file : $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
	}

	/**
	 * Return folder info
	 *
	 * @param  string $hash folder hash
	 * @param bool $resolveLink
	 * @return array|false
	 * @internal param bool $hidden return hidden file info
	 * @author Dmitry (dio) Levashov
	 */
	public function dir($hash, $resolveLink=false) {
		if (($dir = $this->file($hash)) == false) {
			return $this->setError(elFinder::ERROR_DIR_NOT_FOUND);
		}

		if ($resolveLink && !empty($dir['thash'])) {
			$dir = $this->file($dir['thash']);
		}
		
		return $dir && $dir['mime'] == 'directory' && empty($dir['hidden']) 
			? $dir 
			: $this->setError(elFinder::ERROR_NOT_DIR);
	}
	
	/**
	 * Return directory content or false on error
	 *
	 * @param  string   $hash   file hash
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function scandir($hash) {
		if (($dir = $this->dir($hash)) == false) {
			return false;
		}
		
		$path = $this->decode($hash);
		if ($res = $dir['read']
			? $this->getScandir($path)
			: $this->setError(elFinder::ERROR_PERM_DENIED)) {
			
			$dirs = null;
			if ($this->sessionCaching['subdirs'] && isset($this->sessionCache['subdirs'][$path])) {
				$dirs = $this->sessionCache['subdirs'][$path];
			}
			if ($dirs !== null || (isset($dir['dirs']) && $dir['dirs'] != 1)) {
				$_dir = $dir;
				if ($dirs || $this->subdirs($hash)) {
					$dir['dirs'] = 1;
				} else {
					unset($dir['dirs']);
				}
				if ($dir !== $_dir) {
					$this->updateCache($path, $dir);
				}
			}
		}
		
		return $res;
	}

	/**
	 * Return dir files names list
	 *
	 * @param  string $hash file hash
	 * @param null $intersect
	 * @return array
	 * @author Dmitry (dio) Levashov
	 */
	public function ls($hash, $intersect = null) {
		if (($dir = $this->dir($hash)) == false || !$dir['read']) {
			return false;
		}
		
		$list = array();
		$path = $this->decode($hash);
		
		$check = array();
		if ($intersect) {
			$check = array_flip($intersect);
		}
		
		foreach ($this->getScandir($path) as $stat) {
			if (empty($stat['hidden']) && (!$check || isset($check[$stat['name']])) && $this->mimeAccepted($stat['mime'])) {
				$list[$stat['hash']] = $stat['name'];
			}
		}

		return $list;
	}

	/**
	 * Return subfolders for required folder or false on error
	 *
	 * @param  string   $hash  folder hash or empty string to get tree from root folder
	 * @param  int      $deep  subdir deep
	 * @param  string   $exclude  dir hash which subfolders must be exluded from result, required to not get stat twice on cwd subfolders
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function tree($hash='', $deep=0, $exclude='') {
		$path = $hash ? $this->decode($hash) : $this->root;
		
		if (($dir = $this->stat($path)) == false || $dir['mime'] != 'directory') {
			return false;
		}
		
		$dirs = $this->gettree($path, $deep > 0 ? $deep -1 : $this->treeDeep-1, $exclude ? $this->decode($exclude) : null);
		array_unshift($dirs, $dir);
		return $dirs;
	}
	
	/**
	 * Return part of dirs tree from required dir up to root dir
	 *
	 * @param  string    $hash   directory hash
	 * @param  bool|null $lineal only lineal parents
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	public function parents($hash, $lineal = false) {
		if (($current = $this->dir($hash)) == false) {
			return false;
		}

		$path = $this->decode($hash);
		$tree = array();
		
		while ($path && $path != $this->root) {
			$path = $this->dirnameCE($path);
			if (!($stat = $this->stat($path)) || !empty($stat['hidden']) || !$stat['read']) {
				return false;
			}
			
			array_unshift($tree, $stat);
			if (!$lineal) {
				foreach ($this->gettree($path, 0) as $dir) {
					if (!in_array($dir, $tree)) {
						$tree[] = $dir;
					}
				}
			}
		}

		return $tree ? $tree : array($current);
	}

	/**
	 * Create thumbnail for required file and return its name of false on failed
	 *
	 * @param $hash
	 * @return false|string
	 * @author Dmitry (dio) Levashov
	 */
	public function tmb($hash) {
		$path = $this->decode($hash);
		$stat = $this->stat($path);
		
		if (isset($stat['tmb'])) {
			$res = $stat['tmb'] == "1" ? $this->createTmb($path, $stat) : $stat['tmb'];
			if (! $res) {
				list($type) = explode('/', $stat['mime']);
				$fallback = $this->options['resourcePath'] . DIRECTORY_SEPARATOR . strtolower($type) . '.png';
				if (is_file($fallback)) {
					$res = $this->tmbname($stat);
					if (! copy($fallback, $this->tmbPath . DIRECTORY_SEPARATOR . $res)) {
						$res = false;
					}
				}
			}
			return $res;
		}
		return false;
	}
	
	/**
	 * Return file size / total directory size
	 *
	 * @param  string   file hash
	 * @return int
	 * @author Dmitry (dio) Levashov
	 **/
	public function size($hash) {
		return $this->countSize($this->decode($hash));
	}
	
	/**
	 * Open file for reading and return file pointer
	 *
	 * @param  string   file hash
	 * @return Resource
	 * @author Dmitry (dio) Levashov
	 **/
	public function open($hash) {
		if (($file = $this->file($hash)) == false
		|| $file['mime'] == 'directory') {
			return false;
		}
		
		return $this->fopenCE($this->decode($hash), 'rb');
	}
	
	/**
	 * Close file pointer
	 *
	 * @param  Resource  $fp   file pointer
	 * @param  string    $hash file hash
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	public function close($fp, $hash) {
		$this->fcloseCE($fp, $this->decode($hash));
	}
	
	/**
	 * Create directory and return dir info
	 *
	 * @param  string   $dsthash  destination directory hash
	 * @param  string   $name directory name
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function mkdir($dsthash, $name) {
		if ($this->commandDisabled('mkdir')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (!$this->nameAccepted($name)) {
			return $this->setError(elFinder::ERROR_INVALID_NAME);
		}
		
		if (($dir = $this->dir($dsthash)) == false) {
			return $this->setError(elFinder::ERROR_TRGDIR_NOT_FOUND, '#'.$dsthash);
		}
		
		$path = $this->decode($dsthash);
		
		if (!$dir['write'] || !$this->allowCreate($path, $name, true)) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		$dst  = $this->joinPathCE($path, $name);
		$stat = $this->isNameExists($dst); 
		if (!empty($stat)) { 
			return $this->setError(elFinder::ERROR_EXISTS, $name);
		}
		$this->clearcache();
		
		$mkpath = $this->convEncOut($this->_mkdir($this->convEncIn($path), $this->convEncIn($name)));
		if ($mkpath) {
			$this->updateSubdirsCache($path, true);
			$this->updateSubdirsCache($mkpath, false);
		}
		
		return $mkpath? $this->stat($mkpath) : false;
	}
	
	/**
	 * Create empty file and return its info
	 *
	 * @param  string   $dst  destination directory
	 * @param  string   $name file name
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function mkfile($dst, $name) {
		if ($this->commandDisabled('mkfile')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (!$this->nameAccepted($name)) {
			return $this->setError(elFinder::ERROR_INVALID_NAME);
		}
		
		$mimeByName = $this->mimetype($name, true);
		if ($mimeByName && !$this->allowPutMime($mimeByName)) {
			return $this->setError(elFinder::ERROR_UPLOAD_FILE_MIME, $name);
		}
		
		if (($dir = $this->dir($dst)) == false) {
			return $this->setError(elFinder::ERROR_TRGDIR_NOT_FOUND, '#'.$dst);
		}
		
		$path = $this->decode($dst);
		
		if (!$dir['write'] || !$this->allowCreate($path, $name, false)) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if ($this->isNameExists($this->joinPathCE($path, $name))) {
			return $this->setError(elFinder::ERROR_EXISTS, $name);
		}
		
		$this->clearcache();
		return ($path = $this->convEncOut($this->_mkfile($this->convEncIn($path), $this->convEncIn($name)))) ? $this->stat($path) : false;
	}
	
	/**
	 * Rename file and return file info
	 *
	 * @param  string  $hash  file hash
	 * @param  string  $name  new file name
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function rename($hash, $name) {
		if ($this->commandDisabled('rename')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (!$this->nameAccepted($name)) {
			return $this->setError(elFinder::ERROR_INVALID_NAME, $name);
		}
		
		if (!($file = $this->file($hash))) {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}
		
		if ($name === $file['name']) {
			return $file;
		}
		
		if (!empty($file['locked'])) {
			return $this->setError(elFinder::ERROR_LOCKED, $file['name']);
		}
		
		if ($file['mime'] !== 'directory') {
			$mimeByName = $this->mimetype($name, true);
			if ($mimeByName && !$this->allowPutMime($mimeByName)) {
				return $this->setError(elFinder::ERROR_UPLOAD_FILE_MIME, $name);
			}
		}
		
		$path = $this->decode($hash);
		$dir  = $this->dirnameCE($path);
		$stat = $this->isNameExists($this->joinPathCE($dir, $name));
		if ($stat) {
			return $this->setError(elFinder::ERROR_EXISTS, $name);
		}
		
		if (!$this->allowCreate($dir, $name, ($file['mime'] === 'directory'))) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}

		$this->rmTmb($file); // remove old name tmbs, we cannot do this after dir move


		if ($path = $this->convEncOut($this->_move($this->convEncIn($path), $this->convEncIn($dir), $this->convEncIn($name)))) {
			$this->clearcache();
			return $this->stat($path);
		}
		return false;
	}
	
	/**
	 * Create file copy with suffix "copy number" and return its info
	 *
	 * @param  string   $hash    file hash
	 * @param  string   $suffix  suffix to add to file name
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function duplicate($hash, $suffix='copy') {
		if ($this->commandDisabled('duplicate')) {
			return $this->setError(elFinder::ERROR_COPY, '#'.$hash, elFinder::ERROR_PERM_DENIED);
		}
		
		if (($file = $this->file($hash)) == false) {
			return $this->setError(elFinder::ERROR_COPY, elFinder::ERROR_FILE_NOT_FOUND);
		}

		$path = $this->decode($hash);
		$dir  = $this->dirnameCE($path);
		$name = $this->uniqueName($dir, $file['name'], sprintf($this->options['duplicateSuffix'], $suffix));

		if (!$this->allowCreate($dir, $name, ($file['mime'] === 'directory'))) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}

		return ($path = $this->copy($path, $dir, $name)) == false
			? false
			: $this->stat($path);
	}

	/**
	 * Save uploaded file.
	 * On success return array with new file stat and with removed file hash (if existed file was replaced)
	 *
	 * @param  Resource $fp file pointer
	 * @param  string $dst destination folder hash
	 * @param $name
	 * @param  string $tmpname file tmp name - required to detect mime type
	 * @param  array $hashes exists files hash array with filename as key
	 * @return array|false
	 * @internal param string $src file name
	 * @author Dmitry (dio) Levashov
	 */
	public function upload($fp, $dst, $name, $tmpname, $hashes = array()) {
		if ($this->commandDisabled('upload')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (($dir = $this->dir($dst)) == false) {
			return $this->setError(elFinder::ERROR_TRGDIR_NOT_FOUND, '#'.$dst);
		}

		if (!$dir['write']) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (!$this->nameAccepted($name)) {
			return $this->setError(elFinder::ERROR_INVALID_NAME);
		}
		
		$mimeByName = '';
		if ($this->mimeDetect === 'internal') {
			$mime = $this->mimetype($name, true);
		} else {
			$mime = $this->mimetype($tmpname, $name);
			$mimeByName = $this->mimetype($name, true);
			if ($mime === 'unknown') {
				$mime = $mimeByName;
			}
		}

		if (!$this->allowPutMime($mime) || ($mimeByName && !$this->allowPutMime($mimeByName))) {
			return $this->setError(elFinder::ERROR_UPLOAD_FILE_MIME);
		}

		$tmpsize = sprintf('%u', filesize($tmpname));
		if ($this->uploadMaxSize > 0 && $tmpsize > $this->uploadMaxSize) {
			return $this->setError(elFinder::ERROR_UPLOAD_FILE_SIZE);
		}

		$dstpath = $this->decode($dst);
		if (isset($hashes[$name])) {
			$test = $this->decode($hashes[$name]);
			$file = $this->stat($test);
		} else {
			$test = $this->joinPathCE($dstpath, $name);
			$file = $this->isNameExists($test);
		}
		
		$this->clearcache();
		
		if ($file && $file['name'] === $name) { // file exists and check filename for item ID based filesystem
			// check POST data `overwrite` for 3rd party uploader
			$overwrite = isset($_POST['overwrite'])? (bool)$_POST['overwrite'] : $this->options['uploadOverwrite'];
			if ($overwrite) {
				if (!$file['write']) {
					return $this->setError(elFinder::ERROR_PERM_DENIED);
				} elseif ($file['mime'] == 'directory') {
					return $this->setError(elFinder::ERROR_NOT_REPLACE, $name);
				} 
				$this->remove($test);
			} else {
				$name = $this->uniqueName($dstpath, $name, '-', false);
			}
		}
		
		$stat = array(
			'mime'   => $mime, 
			'width'  => 0, 
			'height' => 0, 
			'size'   => $tmpsize);
		
		// $w = $h = 0;
		if (strpos($mime, 'image') === 0 && ($s = getimagesize($tmpname))) {
			$stat['width'] = $s[0];
			$stat['height'] = $s[1];
		}
		// $this->clearcache();
		if (($path = $this->saveCE($fp, $dstpath, $name, $stat)) == false) {
			return false;
		}
		
		$stat = $this->stat($path);
		// Try get URL
		if (empty($stat['url']) && ($url = $this->getContentUrl($stat['hash']))) {
			$stat['url'] = $url;
		}

		return $stat;
	}

	/**
	 * Paste files
	 *
	 * @param  Object $volume source volume
	 * @param $src
	 * @param  string $dst destination dir hash
	 * @param  bool $rmSrc remove source after copy?
	 * @param array $hashes
	 * @return array|false
	 * @internal param string $source file hash
	 * @author Dmitry (dio) Levashov
	 */
	public function paste($volume, $src, $dst, $rmSrc = false, $hashes = array()) {
		$err = $rmSrc ? elFinder::ERROR_MOVE : elFinder::ERROR_COPY;
		
		if ($this->commandDisabled('paste')) {
			return $this->setError($err, '#'.$src, elFinder::ERROR_PERM_DENIED);
		}

		if (($file = $volume->file($src, $rmSrc)) == false) {
			return $this->setError($err, '#'.$src, elFinder::ERROR_FILE_NOT_FOUND);
		}

		$name = $file['name'];
		$errpath = $volume->path($file['hash']);
		
		if (($dir = $this->dir($dst)) == false) {
			return $this->setError($err, $errpath, elFinder::ERROR_TRGDIR_NOT_FOUND, '#'.$dst);
		}
		
		if (!$dir['write'] || !$file['read']) {
			return $this->setError($err, $errpath, elFinder::ERROR_PERM_DENIED);
		}

		$destination = $this->decode($dst);

		if (($test = $volume->closest($src, $rmSrc ? 'locked' : 'read', $rmSrc))) {
			return $rmSrc
				? $this->setError($err, $errpath, elFinder::ERROR_LOCKED, $volume->path($test))
				: $this->setError($err, $errpath, empty($file['thash'])? elFinder::ERROR_PERM_DENIED : elFinder::ERROR_MKOUTLINK);
		}

		if (isset($hashes[$name])) {
			$test = $this->decode($hashes[$name]);
			$stat = $this->stat($test);
		} else {
			$test = $this->joinPathCE($destination, $name);
			$stat = $this->isNameExists($test);
		}
		$this->clearcache();
		$dstDirExists = false;
		if ($stat && $stat['name'] === $name) { // file exists and check filename for item ID based filesystem
			if ($this->options['copyOverwrite']) {
				// do not replace file with dir or dir with file
				if (!$this->isSameType($file['mime'], $stat['mime'])) {
					return $this->setError(elFinder::ERROR_NOT_REPLACE, $this->path($stat['hash']));
				}
				// existed file is not writable
				if (!$stat['write']) {
					return $this->setError($err, $errpath, elFinder::ERROR_PERM_DENIED);
				}
				// existed file locked or has locked child
				if (($locked = $this->closestByAttr($test, 'locked', true))) {
					$stat = $this->stat($locked);
					return $this->setError(elFinder::ERROR_LOCKED, $this->path($stat['hash']));
				}
				// target is entity file of alias
				if ($volume === $this && ((isset($file['target']) && $test == $file['target']) || $test == $this->decode($src))) {
					return $this->setError(elFinder::ERROR_REPLACE, $errpath);
				}
				// remove existed file
				if (! $this->options['copyJoin'] || $stat['mime'] !== 'directory') {
					if (! $this->remove($test)) {
						return $this->setError(elFinder::ERROR_REPLACE, $this->path($stat['hash']));
					}
				} else if ($stat['mime'] === 'directory') {
					$dstDirExists = true;
				}
			} else {
				$name = $this->uniqueName($destination, $name, ' ', false);
			}
		}
		
		// copy/move inside current volume
		if ($volume === $this) { //  changing == operand to === fixes issue #1285 - Paul Canning 24/03/2016
			$source = $this->decode($src);
			// do not copy into itself
			if ($this->inpathCE($destination, $source)) {
				return $this->setError(elFinder::ERROR_COPY_INTO_ITSELF, $errpath);
			}
			$rmDir = false;
			if ($rmSrc) {
				if ($dstDirExists) {
					$rmDir = true;
					$method = 'copy';
				} else {
					$method = 'move';
				}
			} else {
				$method = 'copy';
			}
			$this->clearcache();
			if ($res = ($path = $this->$method($source, $destination, $name)) ? $this->stat($path) : false) {
				if ($rmDir) {
					$this->remove($source);
				}
			} else {
				return false;
			}
		} else {
			// copy/move from another volume
			if (!$this->options['copyTo'] || !$volume->copyFromAllowed()) {
				return $this->setError(elFinder::ERROR_COPY, $errpath, elFinder::ERROR_PERM_DENIED);
			}
			
			if (($path = $this->copyFrom($volume, $src, $destination, $name)) == false) {
				return false;
			}
			
			if ($rmSrc) {
				if (!$volume->rm($src)) {
					return $this->setError(elFinder::ERROR_MOVE, $errpath, elFinder::ERROR_RM_SRC);
				}
			}
			$res = $this->stat($path);
		}
		return $res;
	}
	
	/**
	 * Return path to archive of target items
	 * 
	 * @param  array  $hashes
	 * @return string archive path
	 * @author Naoki Sawada
	 */
	public function zipdl($hashes) {
		if ($this->commandDisabled('zipdl')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		$archivers = $this->getArchivers();
		$cmd = null;
		if (!$archivers || empty($archivers['create'])) {
			return false;
		}
		$archivers = $archivers['create'];
		foreach(array('zip', 'tgz') as $ext) {
			$mime = self::$mimetypes[$ext];
			if (isset($archivers[$mime])) {
				$cmd = $archivers[$mime];
				break;
			}
		}
		if (!$cmd) {
			$cmd = $archivers[0];
			$ext = $cmd['ext'];
			$mime = $this->mimetype('file.'.$ext, true);
		}
		$res = false;
		$mixed = false;
		$hashes = array_values($hashes);
		$dirname = dirname(str_replace($this->separator, DIRECTORY_SEPARATOR, $this->path($hashes[0])));
		$cnt = count($hashes);
		if ($cnt > 1) {
			for($i = 1; $i < $cnt; $i++) {
				if ($dirname !== dirname(str_replace($this->separator, DIRECTORY_SEPARATOR, $this->path($hashes[$i])))) {
					$mixed = true;
					break;
				}
			}
		}
		if ($mixed || $this->root == $this->dirnameCE($this->decode($hashes[0]))) {
			$prefix = $this->rootName;
		} else {
			$prefix = basename($dirname);
		}
		if ($dir = $this->getItemsInHand($hashes)) {
			$tmppre = (substr(PHP_OS, 0, 3) === 'WIN')? 'zdl' : 'elfzdl';
			$pdir = dirname($dir);
			// garbage collection
			$ttl = 7200; // expire 2h
			$time = time();
			foreach(glob($pdir.DIRECTORY_SEPARATOR.$tmppre.'*') as $_file) {
				if (filemtime($_file) + $ttl < $time) {
					unlink($_file);
				}
			}
			$files = self::localScandir($dir);
			if ($files && ($arc = tempnam($dir, $tmppre))) {
				unlink($arc);
				$arc = $arc.'.'.$ext;
				$name = basename($arc);
				if ($arc = $this->makeArchive($dir, $files, $name, $cmd)) {
					$file = tempnam($pdir, $tmppre);
					unlink($file);
					$res = rename($arc, $file);
					$this->rmdirRecursive($dir);
				}
			}
		}
		return $res? array('path' => $file, 'ext' => $ext, 'mime' => $mime, 'prefix' => $prefix) : false;
	}
	
	/**
	 * Return file contents
	 *
	 * @param  string  $hash  file hash
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	public function getContents($hash) {
		$file = $this->file($hash);
		
		if (!$file) {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}
		
		if ($file['mime'] == 'directory') {
			return $this->setError(elFinder::ERROR_NOT_FILE);
		}
		
		if (!$file['read']) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		return $this->_getContents($this->convEncIn($this->decode($hash), true));
	}
	
	/**
	 * Put content in text file and return file info.
	 *
	 * @param  string  $hash     file hash
	 * @param  string  $content  new file content
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	public function putContents($hash, $content) {
		if ($this->commandDisabled('edit')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		$path = $this->decode($hash);
		
		if (!($file = $this->file($hash))) {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}
		
		if (!$file['write']) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		// check MIME
		$name = $this->basenameCE($path);
		$mime = '';
		$mimeByName = $this->mimetype($name, true);
		if ($this->mimeDetect !== 'internal') {
			if ($tp = tmpfile()) {
				fwrite($tp, $content);
				$info = stream_get_meta_data($tp);
				$filepath = $info['uri'];
				$mime = $this->mimetype($filepath, $name);
				fclose($tp);
			}
		}
		if (!$this->allowPutMime($mimeByName) || ($mime && !$this->allowPutMime($mime))) {
			return $this->setError(elFinder::ERROR_UPLOAD_FILE_MIME);
		}
		
		$this->clearcache();
		return $this->convEncOut($this->_filePutContents($this->convEncIn($path), $content)) ? $this->stat($path) : false;
	}

	/**
	 * Extract files from archive
	 *
	 * @param  string $hash archive hash
	 * @param null $makedir
	 * @return array|bool
	 * @author Dmitry (dio) Levashov,
	 * @author Alexey Sukhotin
	 */
	public function extract($hash, $makedir = null) {
		if ($this->commandDisabled('extract')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (($file = $this->file($hash)) == false) {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}
		
		$archiver = isset($this->archivers['extract'][$file['mime']])
			? $this->archivers['extract'][$file['mime']]
			: false;
			
		if (!$archiver) {
			return $this->setError(elFinder::ERROR_NOT_ARCHIVE);
		}
		
		$path   = $this->decode($hash);
		$parent = $this->stat($this->dirnameCE($path));

		if (!$file['read'] || !$parent['write']) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		$this->clearcache();
		$this->extractToNewdir = is_null($makedir)? 'auto' : (bool)$makedir;
		
		if ($path = $this->convEncOut($this->_extract($this->convEncIn($path), $archiver))) {
			if (is_array($path)) {
				foreach ($path as $_k => $_p) {
					$path[$_k] = $this->stat($_p);
				}
			} else {
				$path = $this->stat($path);
			}
			return $path;
		} else {
			return false;
		}
	}

	/**
	 * Add files to archive
	 *
	 * @param $hashes
	 * @param $mime
	 * @param string $name
	 * @return array|bool
	 */
	public function archive($hashes, $mime, $name = '') {
		if ($this->commandDisabled('archive')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}

		if ($name !== '' && !$this->nameAccepted($name)) {
			return $this->setError(elFinder::ERROR_INVALID_NAME);
		}

		$archiver = isset($this->archivers['create'][$mime])
			? $this->archivers['create'][$mime]
			: false;
			
		if (!$archiver) {
			return $this->setError(elFinder::ERROR_ARCHIVE_TYPE);
		}
		
		$files = array();
		
		foreach ($hashes as $hash) {
			if (($file = $this->file($hash)) == false) {
				return $this->setError(elFinder::ERROR_FILE_NOT_FOUND, '#'+$hash);
			}
			if (!$file['read']) {
				return $this->setError(elFinder::ERROR_PERM_DENIED);
			}
			$path = $this->decode($hash);
			if (!isset($dir)) {
				$dir = $this->dirnameCE($path);
				$stat = $this->stat($dir);
				if (!$stat['write']) {
					return $this->setError(elFinder::ERROR_PERM_DENIED);
				}
			}
			
			$files[] = $this->basenameCE($path);
		}
		
		if ($name === '') {
			$name = count($files) == 1 ? $files[0] : 'Archive';
		} else {
			$name = str_replace(array('/', '\\'), '_', preg_replace('/\.' . preg_quote($archiver['ext'], '/') . '$/i', '', $name));
		}
		$name .='.' . $archiver['ext'];
		$name = $this->uniqueName($dir, $name, '');
		$this->clearcache();
		return ($path = $this->convEncOut($this->_archive($this->convEncIn($dir), $this->convEncIn($files), $this->convEncIn($name), $archiver))) ? $this->stat($path) : false;
	}
	
	/**
	 * Resize image
	 *
	 * @param  string   $hash    image file
	 * @param  int      $width   new width
	 * @param  int      $height  new height
	 * @param  int      $x       X start poistion for crop
	 * @param  int      $y       Y start poistion for crop
	 * @param  string   $mode    action how to mainpulate image
	 * @param  string   $bg      background color
	 * @param  int      $degree  rotete degree
	 * @param  int      $jpgQuality  JEPG quality (1-100)
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 * @author Alexey Sukhotin
	 * @author nao-pon
	 * @author Troex Nevelin
	 **/
	public function resize($hash, $width, $height, $x, $y, $mode = 'resize', $bg = '', $degree = 0, $jpgQuality = null) {
		if ($this->commandDisabled('resize')) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		if (($file = $this->file($hash)) == false) {
			return $this->setError(elFinder::ERROR_FILE_NOT_FOUND);
		}
		
		if (!$file['write'] || !$file['read']) {
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}
		
		$path = $this->decode($hash);
		
		$work_path = $this->getWorkFile($this->encoding? $this->convEncIn($path, true) : $path);

		if (!$work_path || !is_writable($work_path)) {
			if ($work_path && $path !== $work_path && is_file($work_path)) {
				unlink($work_path);
			}
			return $this->setError(elFinder::ERROR_PERM_DENIED);
		}

		if ($this->imgLib !== 'imagick' && $this->imgLib !== 'convert') {
			if (elFinder::isAnimationGif($work_path)) {
				return $this->setError(elFinder::ERROR_UNSUPPORT_TYPE);
			}
		}

		switch($mode) {
			
			case 'propresize':
				$result = $this->imgResize($work_path, $width, $height, true, true, null, $jpgQuality);
				break;

			case 'crop':
				$result = $this->imgCrop($work_path, $width, $height, $x, $y, null, $jpgQuality);
				break;

			case 'fitsquare':
				$result = $this->imgSquareFit($work_path, $width, $height, 'center', 'middle', ($bg ? $bg : $this->options['tmbBgColor']), null, $jpgQuality);
				break;

			case 'rotate':
				$result = $this->imgRotate($work_path, $degree, ($bg ? $bg : $this->options['bgColorFb']), null, $jpgQuality);
				break;

			default:
				$result = $this->imgResize($work_path, $width, $height, false, true, null, $jpgQuality);
				break;
		}
		
		$ret = false;
		if ($result) {
			$this->rmTmb($file);
			$this->clearstatcache();
			$stat = $this->stat($path);
			$fstat = stat($work_path);
			$stat['size'] = $fstat['size'];
			$stat['ts'] = $fstat['mtime'];
			if ($imgsize = getimagesize($work_path)) {
				$stat['width'] = $imgsize[0];
				$stat['height'] = $imgsize[1];
				$stat['mime'] = $imgsize['mime'];
			}
			if ($path !== $work_path) {
				if ($fp = fopen($work_path, 'rb')) {
					$ret = $this->saveCE($fp, $this->dirnameCE($path), $this->basenameCE($path), $stat);
					fclose($fp);
				}
			} else {
				$ret = true;
			}
			if ($ret) {
				$this->clearcache();
				$ret = $this->stat($path);
				$ret['width'] = $stat['width'];
				$ret['height'] = $stat['height'];
			}
		}
		if ($path !== $work_path) {
			is_file($work_path) && unlink($work_path);
		}
		
		return $ret;
	}
	
	/**
	 * Remove file/dir
	 *
	 * @param  string  $hash  file hash
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	public function rm($hash) {
		return $this->commandDisabled('rm')
			? $this->setError(elFinder::ERROR_PERM_DENIED)
			: $this->remove($this->decode($hash));
	}

	/**
	 * Search files
	 *
	 * @param  string $q search string
	 * @param  array $mimes
	 * @param null $hash
	 * @return array
	 * @author Dmitry (dio) Levashov
	 */
	public function search($q, $mimes, $hash = null) {
		$dir = null;
		if ($hash) {
			$dir = $this->decode($hash);
			$stat = $this->stat($dir);
			if (!$stat || $stat['mime'] !== 'directory' || !$stat['read']) {
				$q = '';
			}
		}
		if ($mimes && $this->onlyMimes) {
			$mimes = array_intersect($mimes, $this->onlyMimes);
			if (!$mimes) {
				$q = '';
			}
		}
		$this->searchStart = time();
		
		$qs = preg_split('/"([^"]+)"| +/', $q, -1, PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE);
		$query = $excludes = array();
		foreach($qs as $_q) {
			$_q = trim($_q);
			if ($_q !== '') {
				if ($_q[0] === '-') {
					if (isset($_q[1])) {
						$excludes[] = substr($_q, 1);
					}
				} else {
					$query[] = $_q;
				}
			}
		}
		if (! $query) {
			$q = '';
		} else {
			$q = join(' ', $query);
			$this->doSearchCurrentQuery = array(
				'q' => $q,
				'excludes' => $excludes
			);
		}
		
		// valided regex $this->options['searchExDirReg']
		if ($this->options['searchExDirReg']) {
			if (false === preg_match($this->options['searchExDirReg'], '')) {
				$this->options['searchExDirReg'] = '';
			}
		}
		
		return ($q === '' || $this->commandDisabled('search'))
			? array()
			: $this->doSearch(is_null($dir)? $this->root : $dir, $q, $mimes);
	}
	
	/**
	 * Return image dimensions
	 *
	 * @param  string  $hash  file hash
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	public function dimensions($hash) {
		if (($file = $this->file($hash)) == false) {
			return false;
		}
		
		return $this->convEncOut($this->_dimensions($this->convEncIn($this->decode($hash)), $file['mime']));
	}
	
	/**
	 * Return has subdirs
	 *
	 * @param  string  $hash  file hash
	 * @return bool
	 * @author Naoki Sawada
	 **/
	public function subdirs($hash) {
		return (bool) $this->subdirsCE($this->decode($hash));
	}
	
	/**
	 * Return content URL (for netmout volume driver)
	 * If file.url == 1 requests from JavaScript client with XHR
	 * 
	 * @param string $hash  file hash
	 * @param array $options  options array
	 * @return boolean|string
	 * @author Naoki Sawada
	 */
	public function getContentUrl($hash, $options = array()) {
		if (($file = $this->file($hash)) == false || (isset($file['url']) && $file['url'] == 1)) {
			return false;
		}
		if (empty($file['url'])) {
			if ($this->URL) {
				$path = str_replace($this->separator, '/', substr($this->decode($hash), strlen($this->root) + 1));
				if ($this->encoding) {
					$path = str_replace('%2F', '/', rawurlencode($this->convEncIn($path, true)));
				}
				return $this->URL . $path;
			}
			return false;
		} else {
			return $file['url'];
		}
	}
	
	/**
	 * Return temp path
	 * 
	 * @return string
	 * @author Naoki Sawada
	 */
	public function getTempPath() {
		$tempPath = null;
		if (isset($this->tmpPath) && $this->tmpPath && is_writable($this->tmpPath)) {
			$tempPath = $this->tmpPath;
		} else if (isset($this->tmp) && $this->tmp && is_writable($this->tmp)) {
			$tempPath = $this->tmp;
		} else if (function_exists('sys_get_temp_dir')) {
			$tempPath = sys_get_temp_dir();
		} else if (isset($this->tmbPath) && $this->tmbPath && is_writable($this->tmbPath)) {
			$tempPath = $this->tmbPath;
		}
		if ($tempPath && DIRECTORY_SEPARATOR !== '/') {
			$tempPath = str_replace('/', DIRECTORY_SEPARATOR, $tempPath);
		}
		return $tempPath;
	}
	
	/**
	 * (Make &) Get upload taget dirctory hash
	 * 
	 * @param string $baseTargetHash
	 * @param string $path
	 * @param array  $result
	 * @return boolean|string
	 * @author Naoki Sawada
	 */
	public function getUploadTaget($baseTargetHash, $path, & $result) {
		$base = $this->decode($baseTargetHash);
		$targetHash = $baseTargetHash;
		$path = ltrim($path, $this->separator);
		$dirs = explode($this->separator, $path);
		array_pop($dirs);
		foreach($dirs as $dir) {
			$targetPath = $this->joinPathCE($base, $dir);
			if (! $_realpath = $this->realpath($this->encode($targetPath))) {
				if ($stat = $this->mkdir($targetHash, $dir)) {
					$result['added'][] = $stat;
					$targetHash = $stat['hash'];
					$base = $this->decode($targetHash);
				} else {
					return false;
				}
			} else {
				$targetHash = $this->encode($_realpath);
				if ($this->dir($targetHash)) {
					$base = $this->decode($targetHash);
				} else {
					return false;
				}
			}
		}
		return $targetHash;
	}
	
	/**
	 * Return this uploadMaxSize value
	 * 
	 * @return integer
	 * @author Naoki Sawada
	 */
	public function getUploadMaxSize() {
		return $this->uploadMaxSize;
	}
	
	/**
	 * Image file utility
	 * 
	 * @param string $mode     'resize', 'rotate', 'propresize', 'crop', 'fitsquare'
	 * @param string $src      Image file local path
	 * @param array  $options  excute options
	 * @return bool
	 * @author Naoki Sawada
	 */
	public function imageUtil($mode, $src, $options = array()) {
		if (! isset($options['jpgQuality'])) {
			$options['jpgQuality'] = intval($this->options['jpgQuality']);
		}
		if (! isset($options['bgcolor'])) {
			$options['bgcolor'] = '#ffffff';
		}
		if (! isset($options['bgColorFb'])) {
			$options['bgColorFb'] = $this->options['bgColorFb'];
		}
		switch($mode) {
			case 'rotate':
				if (empty($options['degree'])) {
					return true;
				}
				return (bool)$this->imgRotate($src, $options['degree'], $options['bgColorFb'], null, $options['jpgQuality']);
			
			case 'resize':
			case 'propresize':
			case 'crop':
			case 'fitsquare':
				if (empty($options['width']) || empty($options['height'])) {
					return false;
				}
			
			case 'resize':
				return (bool)$this->imgResize($src, $options['width'], $options['height'], false, true, null, $options['jpgQuality'], $options);
			
			case 'propresize':
				return (bool)$this->imgResize($src, $options['width'], $options['height'], true, true, null, $options['jpgQuality'], $options);
			
			case 'crop':
				if (isset($options['x']) && isset($options['y'])) {
					return (bool)$this->imgCrop($src, $options['width'], $options['height'], $options['x'], $options['y'], null, $options['jpgQuality']);
				}
			
			case 'fitsquare':
				return (bool)$this->imgSquareFit($src, $options['width'], $options['height'], 'center', 'middle', $options['bgcolor'], null, $options['jpgQuality']);
			
		}
		return false;
	}
	
	/**
	 * Convert Video To Image by ffmpeg
	 * 
	 * @param  $file video source file path
	 * @param  $stat file stat array
	 * @return bool
	 * @author Naoki Sawada
	 */
	public function ffmpegToImg($file, $stat) {
		$name = basename($file);
		$path = dirname($file);
		$tmp = $path . DIRECTORY_SEPARATOR . md5($name);
		$GLOBALS['elFinderTempFiles'][] = $tmp; // regist to remove at the end
		if (rename($file, $tmp)) {
			// specific start time by file name (xxx^[sec].[extention] - video^3.mp4)
			if (preg_match('/\^(\d+(?:\.\d+)?)\.[^.]+$/', $stat['name'], $_m)) {
				$ss = $_m[1];
			} else {
				$ss = $this->options['tmbVideoConvSec'];
			}
			$cmd = sprintf('ffmpeg -i %s -ss 00:00:%.3f -vframes 1 -f image2 %s', escapeshellarg($tmp), $ss, escapeshellarg($file));
			$r = $this->procExec($cmd);
			unlink($tmp);
			return ($r === 0);
		}
		return false;
	}

	/**
	 * Save error message
	 *
	 * @param  array  error 
	 * @return false
	 * @author Naoki Sawada
	 **/
	protected function setError() {
		$this->error = array();
		$this->addError(func_get_args());
		return false;
	}
	
	/**
	 * Add error message
	 *
	 * @param  array  error 
	 * @return false
	 * @author Dmitry(dio) Levashov
	 **/
	protected function addError() {
		foreach (func_get_args() as $err) {
			if (is_array($err)) {
				$this->error = array_merge($this->error, $err);
			} else {
				$this->error[] = $err;
			}
		}
		return false;
	}
	
	/*********************************************************************/
	/*                               FS API                              */
	/*********************************************************************/
	
	/***************** server encoding support *******************/
	
	/**
	 * Return parent directory path (with convert encoding)
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Naoki Sawada
	 **/
	protected function dirnameCE($path) {
		$dirname = (!$this->encoding)? $this->_dirname($path) :	$this->convEncOut($this->_dirname($this->convEncIn($path)));
		// check to infinite loop prevention
		return ($dirname != $path)? $dirname : '';
	}
	
	/**
	 * Return file name (with convert encoding)
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Naoki Sawada
	 **/
	protected function basenameCE($path) {
		return (!$this->encoding)? $this->_basename($path) : $this->convEncOut($this->_basename($this->convEncIn($path)));
	}
	
	/**
	 * Join dir name and file name and return full path. (with convert encoding)
	 * Some drivers (db) use int as path - so we give to concat path to driver itself
	 *
	 * @param  string  $dir   dir path
	 * @param  string  $name  file name
	 * @return string
	 * @author Naoki Sawada
	 **/
	protected function joinPathCE($dir, $name) {
		return (!$this->encoding)? $this->_joinPath($dir, $name) : $this->convEncOut($this->_joinPath($this->convEncIn($dir), $this->convEncIn($name)));
	}
	
	/**
	 * Return normalized path (with convert encoding)
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Naoki Sawada
	 **/
	protected function normpathCE($path) {
		return (!$this->encoding)? $this->_normpath($path) : $this->convEncOut($this->_normpath($this->convEncIn($path)));
	}
	
	/**
	 * Return file path related to root dir (with convert encoding)
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Naoki Sawada
	 **/
	protected function relpathCE($path) {
		return (!$this->encoding)? $this->_relpath($path) : $this->convEncOut($this->_relpath($this->convEncIn($path)));
	}
	
	/**
	 * Convert path related to root dir into real path (with convert encoding)
	 *
	 * @param  string  $path  rel file path
	 * @return string
	 * @author Naoki Sawada
	 **/
	protected function abspathCE($path) {
		return (!$this->encoding)? $this->_abspath($path): $this->convEncOut($this->_abspath($this->convEncIn($path)));
	}
	
	/**
	 * Return true if $path is children of $parent (with convert encoding)
	 *
	 * @param  string  $path    path to check
	 * @param  string  $parent  parent path
	 * @return bool
	 * @author Naoki Sawada
	 **/
	protected function inpathCE($path, $parent) {
		return (!$this->encoding)? $this->_inpath($path, $parent) : $this->convEncOut($this->_inpath($this->convEncIn($path), $this->convEncIn($parent)));
	}

	/**
	 * Open file and return file pointer (with convert encoding)
	 *
	 * @param  string $path file path
	 * @param string $mode
	 * @return false|resource
	 * @internal param bool $write open file for writing
	 * @author Naoki Sawada
	 */
	protected function fopenCE($path, $mode='rb') {
		return (!$this->encoding)? $this->_fopen($path, $mode) : $this->convEncOut($this->_fopen($this->convEncIn($path), $mode));
	}
	
	/**
	 * Close opened file (with convert encoding)
	 * 
	 * @param  resource  $fp    file pointer
	 * @param  string    $path  file path
	 * @return bool
	 * @author Naoki Sawada
	 **/
	protected function fcloseCE($fp, $path='') {
		return (!$this->encoding)? $this->_fclose($fp, $path) : $this->convEncOut($this->_fclose($fp, $this->convEncIn($path)));
	}
	
	/**
	 * Create new file and write into it from file pointer. (with convert encoding)
	 * Return new file path or false on error.
	 *
	 * @param  resource  $fp   file pointer
	 * @param  string    $dir  target dir path
	 * @param  string    $name file name
	 * @param  array     $stat file stat (required by some virtual fs)
	 * @return bool|string
	 * @author Naoki Sawada
	 **/
	protected function saveCE($fp, $dir, $name, $stat) {
		return (!$this->encoding)? $this->_save($fp, $dir, $name, $stat) : $this->convEncOut($this->_save($fp, $this->convEncIn($dir), $this->convEncIn($name), $this->convEncIn($stat)));
	}
	
	/**
	 * Return true if path is dir and has at least one childs directory (with convert encoding)
	 *
	 * @param  string  $path  dir path
	 * @return bool
	 * @author Naoki Sawada
	 **/
	protected function subdirsCE($path) {
		if ($this->sessionCaching['subdirs']) {
			if (isset($this->sessionCache['subdirs'][$path]) && ! $this->isMyReload()) {
				return $this->sessionCache['subdirs'][$path];
			}
		}
		$hasdir = (bool) ((!$this->encoding)? $this->_subdirs($path) : $this->convEncOut($this->_subdirs($this->convEncIn($path))));
		$this->updateSubdirsCache($path, $hasdir);
		return $hasdir;
	}
	
	/**
	 * Return files list in directory (with convert encoding)
	 *
	 * @param  string  $path  dir path
	 * @return array
	 * @author Naoki Sawada
	 **/
	protected function scandirCE($path) {
		return (!$this->encoding)? $this->_scandir($path) : $this->convEncOut($this->_scandir($this->convEncIn($path)));
	}
	
	/**
	 * Create symlink (with convert encoding)
	 *
	 * @param  string  $source     file to link to
	 * @param  string  $targetDir  folder to create link in
	 * @param  string  $name       symlink name
	 * @return bool
	 * @author Naoki Sawada
	 **/
	protected function symlinkCE($source, $targetDir, $name) {
		return (!$this->encoding)? $this->_symlink($source, $targetDir, $name) : $this->convEncOut($this->_symlink($this->convEncIn($source), $this->convEncIn($targetDir), $this->convEncIn($name)));
	}
	
	/***************** paths *******************/
	
	/**
	 * Encode path into hash
	 *
	 * @param  string  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 * @author Troex Nevelin
	 **/
	protected function encode($path) {
		if ($path !== '') {

			// cut ROOT from $path for security reason, even if hacker decodes the path he will not know the root
			$p = $this->relpathCE($path);
			// if reqesting root dir $path will be empty, then assign '/' as we cannot leave it blank for crypt
			if ($p === '')	{
				$p = $this->separator;
			}

			// TODO crypt path and return hash
			$hash = $this->crypt($p);
			// hash is used as id in HTML that means it must contain vaild chars
			// make base64 html safe and append prefix in begining
			$hash = strtr(base64_encode($hash), '+/=', '-_.');
			// remove dots '.' at the end, before it was '=' in base64
			$hash = rtrim($hash, '.'); 
			// append volume id to make hash unique
			return $this->id.$hash;
		}
	    //TODO: Add return statement here
	}
	
	/**
	 * Decode path from hash
	 *
	 * @param  string  file hash
	 * @return string
	 * @author Dmitry (dio) Levashov
	 * @author Troex Nevelin
	 **/
	protected function decode($hash) {
		if (strpos($hash, $this->id) === 0) {
			// cut volume id after it was prepended in encode
			$h = substr($hash, strlen($this->id));
			// replace HTML safe base64 to normal
			$h = base64_decode(strtr($h, '-_.', '+/='));
			// TODO uncrypt hash and return path
			$path = $this->uncrypt($h); 
			// append ROOT to path after it was cut in encode
			return $this->abspathCE($path);//$this->root.($path === $this->separator ? '' : $this->separator.$path); 
		}
	    //TODO: Add return statement here
	}
	
	/**
	 * Return crypted path 
	 * Not implemented
	 *
	 * @param  string  path
	 * @return mixed
	 * @author Dmitry (dio) Levashov
	 **/
	protected function crypt($path) {
		return $path;
	}
	
	/**
	 * Return uncrypted path 
	 * Not implemented
	 *
	 * @param  mixed  hash
	 * @return mixed
	 * @author Dmitry (dio) Levashov
	 **/
	protected function uncrypt($hash) {
		return $hash;
	}
	
	/**
	 * Validate file name based on $this->options['acceptedName'] regexp or function
	 *
	 * @param  string  $name  file name
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function nameAccepted($name) {
		if (json_encode($name)===false) {
			return false;
		}
		if ($this->nameValidator) {
			if (is_callable($this->nameValidator)) {
				$res = call_user_func($this->nameValidator, $name);
				return $res;
			}
			if (preg_match($this->nameValidator, '') !== false) {
				return preg_match($this->nameValidator, $name);
			}
		}
		return true;
	}

	/**
	 * Return session rootstat cache key
	 * 
	 * @return string
	 */
	protected function getRootstatCachekey() {
		return md5($this->root.(isset($this->options['alias'])? $this->options['alias'] : ''));
	}

	/**
	 * Return new unique name based on file name and suffix
	 *
	 * @param $dir
	 * @param $name
	 * @param  string $suffix suffix append to name
	 * @param bool $checkNum
	 * @param int $start
	 * @return string
	 * @internal param string $path file path
	 * @author Dmitry (dio) Levashov
	 */
	public function uniqueName($dir, $name, $suffix = ' copy', $checkNum = true, $start = 1) {
		$ext  = '';

		if (preg_match('/\.((tar\.(gz|bz|bz2|z|lzo))|cpio\.gz|ps\.gz|xcf\.(gz|bz2)|[a-z0-9]{1,4})$/i', $name, $m)) {
			$ext  = '.'.$m[1];
			$name = substr($name, 0,  strlen($name)-strlen($m[0]));
		} 
		
		if ($checkNum && preg_match('/('.preg_quote($suffix, '/').')(\d*)$/i', $name, $m)) {
			$i    = (int)$m[2];
			$name = substr($name, 0, strlen($name)-strlen($m[2]));
		} else {
			$i     = $start;
			$name .= $suffix;
		}
		$max = $i+100000;

		while ($i <= $max) {
			$n = $name.($i > 0 ? sprintf($this->options['uniqueNumFormat'], $i) : '').$ext;

			if (!$this->isNameExists($this->joinPathCE($dir, $n))) {
				$this->clearcache();
				return $n;
			}
			$i++;
		}
		return $name.md5($dir).$ext;
	}
	
	/**
	 * Converts character encoding from UTF-8 to server's one
	 * 
	 * @param  mixed  $var           target string or array var
	 * @param  bool   $restoreLocale do retore global locale, default is false
	 * @param  string $unknown       replaces character for unknown
	 * @return mixed
	 * @author Naoki Sawada
	 */
	public function convEncIn($var = null, $restoreLocale = false, $unknown = '_') {
		return (!$this->encoding)? $var : $this->convEnc($var, 'UTF-8', $this->encoding, $this->options['locale'], $restoreLocale, $unknown);
	}
	
	/**
	 * Converts character encoding from server's one to UTF-8
	 * 
	 * @param  mixed  $var           target string or array var
	 * @param  bool   $restoreLocale do retore global locale, default is true
	 * @param  string $unknown       replaces character for unknown
	 * @return mixed
	 * @author Naoki Sawada
	 */
	public function convEncOut($var = null, $restoreLocale = true, $unknown = '_') {
		return (!$this->encoding)? $var : $this->convEnc($var, $this->encoding, 'UTF-8', $this->options['locale'], $restoreLocale, $unknown);
	}

	/**
	 * Converts character encoding (base function)
	 *
	 * @param  mixed $var target string or array var
	 * @param  string $from from character encoding
	 * @param  string $to to character encoding
	 * @param  string $locale local locale
	 * @param $restoreLocale
	 * @param  string $unknown replaces character for unknown
	 * @return mixed
	 */
	protected function convEnc($var, $from, $to, $locale, $restoreLocale, $unknown = '_') {
		if (strtoupper($from) !== strtoupper($to)) {
			if ($locale) {
				setlocale(LC_ALL, $locale);
			}
			if (is_array($var)) {
				$_ret = array();
				foreach($var as $_k => $_v) {
					$_ret[$_k] = $this->convEnc($_v, $from, $to, '', false, $unknown = '_');
				}
				$var = $_ret;
			} else {
				$_var = false;
				if (is_string($var)) {
					$_var = $var;
					if (false !== ($_var = iconv($from, $to.'//TRANSLIT', $_var))) {
						$_var = str_replace('?', $unknown, $_var);
					}
				}
				if  ($_var !== false) {
					$var = $_var;
				}
			}
			if ($restoreLocale) {
				setlocale(LC_ALL, elFinder::$locale);
			}
		}
		return $var;
	}
	
	/*********************** util mainly for inheritance class *********************/
	
	/**
	 * Get temporary filename. Tempfile will be removed when after script execution finishes or exit() is called.
	 * When needing the unique file to a path, give $path to parameter.
	 * 
	 * @param  string       $path for get unique file to a path
	 * @return string|false
	 * @author Naoki Sawada
	 */
	protected function getTempFile($path = '') {
		static $cache = array();
		static $rmfunc;
		
		$key = '';
		if ($path !== '') {
			$key = $this->id . '#' . $path;
			if (isset($cache[$key])) {
				return $cache[$key];
			}
		}
		
		if ($tmpdir = $this->getTempPath()) {
			if (!$rmfunc) {
				$rmfunc = create_function('$f', 'is_file($f) && unlink($f);');
			}
			$name = tempnam($tmpdir, 'ELF');
			if ($key) {
				$cache[$key] = $name;
			}
			register_shutdown_function($rmfunc, $name);
			return $name;
		}
		
		return false;
	}
	
	/**
	 * File path of local server side work file path
	 * 
	 * @param  string $path path need convert encoding to server encoding
	 * @return string
	 * @author Naoki Sawada
	 */
	protected function getWorkFile($path) {
		if ($work = $this->getTempFile()) {
			if ($wfp = fopen($work, 'wb')) {
				if ($fp = $this->_fopen($path)) {
					while(!feof($fp)) {
						fwrite($wfp, fread($fp, 8192));
					}
					$this->_fclose($fp, $path);
					fclose($wfp);
					return $work;
				}
			}
		}
		return false;
	}
	
	/**
	 * Get image size array with `dimensions`
	 *
	 * @param string $path path need convert encoding to server encoding
	 * @param string $mime file mime type
	 * @return array|false
	 */
	public function getImageSize($path, $mime = '') {
		$size = false;
		if ($mime === '' || strtolower(substr($mime, 0, 5)) === 'image') {
			if ($work = $this->getWorkFile($path)) {
				if ($size = getimagesize($work)) {
					$size['dimensions'] = $size[0].'x'.$size[1];
				}
			}
			is_file($work) && unlink($work);
		}
		return $size;
	}
	
	/**
	 * Delete dirctory trees
	 *
	 * @param string $localpath path need convert encoding to server encoding
	 * @return boolean
	 * @author Naoki Sawada
	 */
	protected function delTree($localpath) {
		foreach ($this->_scandir($localpath) as $p) {
			elFinder::extendTimeLimit();
			$stat = $this->stat($this->convEncOut($p));
			$this->convEncIn();
			($stat['mime'] === 'directory')? $this->delTree($p) : $this->_unlink($p);
		}
		return $this->_rmdir($localpath);
	}
	
	/**
	 * Copy items to a new temporary directory on the local server
	 * 
	 * @param  array  $hashes  target hashes
	 * @param  string $dir     destination directory (for recurcive)
	 * @param  string $canLink it can use link() (for recurcive)
	 * @return string|false    saved path name
	 * @author Naoki Sawada
	 */
	protected function getItemsInHand($hashes, $dir = null, $canLink = null) {
		static $totalSize = 0;
		if (is_null($dir)) {
			$totalSize = 0;
			if (! $tmpDir = $this->getTempPath()) {
				return false;
			}
			$dir = tempnam($tmpDir, 'elf');
			if (!unlink($dir) || !mkdir($dir, 0700, true)) {
				return false;
			}
			register_shutdown_function(array($this, 'rmdirRecursive'), $dir);
		}
		if (is_null($canLink)) {
			$canLink = ($this instanceof elFinderVolumeLocalFileSystem);
		}
		elFinder::extendTimeLimit();
		$res = true;
		$files = array();
		foreach ($hashes as $hash) {
			if (($file = $this->file($hash)) == false) {
				continue;
			}
			if (!$file['read']) {
				continue;
			}
			
			$name = $file['name'];
			// for call from search results
			if (isset($files[$name])) {
				$name = preg_replace('/^(.*?)(\..*)?$/', '$1_'.$files[$name]++.'$2', $name);
			} else {
				$files[$name] = 1;
			}
			$target = $dir.DIRECTORY_SEPARATOR.$name;
			
			if ($file['mime'] === 'directory') {
				$chashes = array();
				$_files = $this->scandir($hash);
				foreach($_files as $_file) {
					if ($file['read']) {
						$chashes[] = $_file['hash'];
					}
				}
				if (($res = mkdir($target, 0700, true)) && $chashes) {
					$res = $this->getItemsInHand($chashes, $target, $canLink);
				}
				if (!$res) {
					break;
				}
				!empty($file['ts']) && touch($target, $file['ts']);
			} else {
				$path = $this->decode($hash);
				if (! $canLink || ! ($canLink = link($path, $target))) {
					if ($fp = $this->fopenCE($path)) {
						if ($tfp = fopen($target, 'wb')) {
							$totalSize += stream_copy_to_stream($fp, $tfp);
							fclose($tfp);
						}
						!empty($file['ts']) && touch($target, $file['ts']);
						$this->fcloseCE($fp, $path);
					}
				} else {
					$totalSize += filesize($path);
				}
				if ($this->options['maxArcFilesSize'] > 0 && $this->options['maxArcFilesSize'] < $totalSize) {
					$res = $this->setError(elFinder::ERROR_ARC_MAXSIZE);
				}
			}
		}
		return $res? $dir : false;
	}
	
	/*********************** file stat *********************/
	
	/**
	 * Check file attribute
	 *
	 * @param  string  $path  file path
	 * @param  string  $name  attribute name (read|write|locked|hidden)
	 * @param  bool    $val   attribute value returned by file system
	 * @param  bool    $isDir path is directory (true: directory, false: file)
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function attr($path, $name, $val=null, $isDir=null) {
		if (!isset($this->defaults[$name])) {
			return false;
		}
		
		
		$perm = null;
		
		if ($this->access) {
			$perm = call_user_func($this->access, $name, $path, $this->options['accessControlData'], $this, $isDir);

			if ($perm !== null) {
				return !!$perm;
			}
		}
		
		if ($this->separator != '/') {
			$path = str_replace($this->separator, '/', $this->relpathCE($path));
		} else {
			$path = $this->relpathCE($path);
		}

		$path = '/'.$path;

		for ($i = 0, $c = count($this->attributes); $i < $c; $i++) {
			$attrs = $this->attributes[$i];
			
			if (isset($attrs[$name]) && isset($attrs['pattern']) && preg_match($attrs['pattern'], $path)) {
				$perm = $attrs[$name];
			} 
		}
		
		return $perm === null ? (is_null($val)? $this->defaults[$name] : $val) : !!$perm;
	}

	/**
	 * Return true if file with given name can be created in given folder.
	 *
	 * @param string $dir parent dir path
	 * @param string $name new file name
	 * @param null $isDir
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 */
	protected function allowCreate($dir, $name, $isDir = null) {
		$path = $this->joinPathCE($dir, $name);
		$perm = null;
		
		if ($this->access) {
			$perm = call_user_func($this->access, 'write', $path, $this->options['accessControlData'], $this, $isDir);			
			if ($perm !== null) {
				return !!$perm;
			}
		}
		
		$testPath = $this->separator.$this->relpathCE($path);
		
		for ($i = 0, $c = count($this->attributes); $i < $c; $i++) {
			$attrs = $this->attributes[$i];
			
			if (isset($attrs['write']) && isset($attrs['pattern']) && preg_match($attrs['pattern'], $testPath)) {
				$perm = $attrs['write'];
			} 
		}
		
		return $perm === null ? true : $perm;
	}
	
	/**
	 * Return true if file MIME type can save with check uploadOrder config.
	 * 
	 * @param string $mime
	 * @return boolean
	 */
	protected function allowPutMime($mime) {
		// logic based on http://httpd.apache.org/docs/2.2/mod/mod_authz_host.html#order
		$allow  = $this->mimeAccepted($mime, $this->uploadAllow, null);
		$deny   = $this->mimeAccepted($mime, $this->uploadDeny,  null);
		$res = true; // default to allow
		if (strtolower($this->uploadOrder[0]) == 'allow') { // array('allow', 'deny'), default is to 'deny'
			$res = false; // default is deny
			if (!$deny && ($allow === true)) { // match only allow
				$res = true;
			}// else (both match | no match | match only deny) { deny }
		} else { // array('deny', 'allow'), default is to 'allow' - this is the default rule
			$res = true; // default is allow
			if (($deny === true) && !$allow) { // match only deny
				$res = false;
			} // else (both match | no match | match only allow) { allow }
		}
		return $res;
	}
	
	/**
	 * Return fileinfo 
	 *
	 * @param  string  $path  file cache
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	protected function stat($path) {
		if ($path === false || is_null($path)) {
			return false;
		}
		$is_root = ($path == $this->root);
		if ($is_root) {
			$rootKey = $this->getRootstatCachekey();
			if ($this->sessionCaching['rootstat'] && !isset($this->sessionCache['rootstat'])) {
				$this->sessionCache['rootstat'] = array();
			}
			if (! isset($this->cache[$path]) && ! $this->isMyReload()) {
				// need $path as key for netmount/netunmount
				if ($this->sessionCaching['rootstat'] && isset($this->sessionCache['rootstat'][$rootKey])) {
					if ($ret = $this->sessionCache['rootstat'][$rootKey]) {
						if ($this->options['rootRev'] === $ret['rootRev']) {
							if (isset($this->options['phash'])) {
								$ret['isroot'] = 1;
								$ret['phash'] = $this->options['phash'];
							}
							return $ret;
						}
					}
				}
			}
		}
		$ret = isset($this->cache[$path])
			? $this->cache[$path]
			: $this->updateCache($path, $this->convEncOut($this->_stat($this->convEncIn($path))));
		if ($is_root && $this->sessionCaching['rootstat']) {
			if ($ret) {
				$this->rootModified = false;
				$this->sessionCache['rootstat'][$rootKey] = $ret;
				if (isset($this->options['phash'])) {
					$ret['isroot'] = 1;
					$ret['phash'] = $this->options['phash'];
				}
			} else {
				unset($this->sessionCache['rootstat'][$rootKey]);
			}
		}
		return $ret;
	}
	
	/**
	 * Get root stat extra key values
	 * 
	 * @return array stat extras
	 * @author Naoki Sawada
	 */
	protected function getRootStatExtra() {
		$stat = array();
		if ($this->rootName) {
			$stat['name'] = $this->rootName;
		}
		$stat['rootRev'] = $this->options['rootRev'];
		$stat['options'] = $this->options(null);
		return $stat;
	}
	
	/**
	 * Return fileinfo based on filename
	 * For item ID based path file system
	 * Please override if needed on each drivers
	 *
	 * @param  string  $path  file cache
	 * @return array
	 */
	protected function isNameExists($path) {
		return $this->stat($path);
	}
	
	/**
	 * Put file stat in cache and return it
	 *
	 * @param  string  $path   file path
	 * @param  array   $stat   file stat
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	protected function updateCache($path, $stat) {
		if (empty($stat) || !is_array($stat)) {
			return $this->cache[$path] = array();
		}

		$stat['hash'] = $this->encode($path);

		$root = $path == $this->root;
		$parent = '';
		
		if ($root) {
			$stat = array_merge($stat, $this->getRootStatExtra());
		} else {
			if (!isset($stat['name']) || $stat['name'] === '') {
				$stat['name'] = $this->basenameCE($path);
			}
			if (empty($stat['phash'])) {
				$parent = $this->dirnameCE($path);
				$stat['phash'] = $this->encode($parent);
			} else {
				$parent = $this->decode($stat['phash']);
			}
		}
		
		// name check
		if (!$jeName = json_encode($stat['name'])) {
			return $this->cache[$path] = array();
		}
		// fix name if required
		if ($this->options['utf8fix'] && $this->options['utf8patterns'] && $this->options['utf8replace']) {
			$stat['name'] = json_decode(str_replace($this->options['utf8patterns'], $this->options['utf8replace'], $jeName));
		}
		
		
		if (empty($stat['mime'])) {
			$stat['mime'] = $this->mimetype($stat['name'], true);
		}
		
		// @todo move dateformat to client
		// $stat['date'] = isset($stat['ts'])
		// 	? $this->formatDate($stat['ts'])
		// 	: 'unknown';
			
		if (!isset($stat['size'])) {
			$stat['size'] = 'unknown';
		}	

		if ($isDir = ($stat['mime'] === 'directory')) {
			$stat['volumeid'] = $this->id;
		}
		
		$stat['read']  = intval($this->attr($path, 'read', isset($stat['read']) ? !!$stat['read'] : null, $isDir));
		$stat['write'] = intval($this->attr($path, 'write', isset($stat['write']) ? !!$stat['write'] : null, $isDir));
		if ($root) {
			$stat['locked'] = 1;
			if ($this->options['type'] !== '') {
				$stat['type'] = $this->options['type'];
			}
		} else {
			// lock when parent directory is not writable
			if (!isset($stat['locked'])) {
				$pstat = $this->stat($parent);
				if (isset($pstat['write']) && !$pstat['write']) {
					$stat['locked'] = true;
				}
			}
			if ($this->attr($path, 'locked', isset($stat['locked']) ? !!$stat['locked'] : null, $isDir)) {
				$stat['locked'] = 1;
			} else {
				unset($stat['locked']);
			}
		}

		if ($root) {
			unset($stat['hidden']);
		} elseif ($this->attr($path, 'hidden', isset($stat['hidden']) ? !!$stat['hidden'] : null, $isDir) 
		|| !$this->mimeAccepted($stat['mime'])) {
			$stat['hidden'] = 1;
		} else {
			unset($stat['hidden']);
		}
		
		if ($stat['read'] && empty($stat['hidden'])) {
			
			if ($isDir) {
				// caching parent's subdirs
				if ($parent) {
					$this->updateSubdirsCache($parent, true);
				}
				// for dir - check for subdirs
				if ($this->options['checkSubfolders']) {
					if (! isset($stat['dirs']) && intval($this->options['checkSubfolders']) === -1) {
						$stat['dirs'] = -1;
					}
					if (isset($stat['dirs'])) {
						if ($stat['dirs']) {
							if ($stat['dirs'] == -1) {
								$stat['dirs'] = ($this->sessionCaching['subdirs'] && isset($this->sessionCache['subdirs'][$path]))? (int)$this->sessionCache['subdirs'][$path] : -1;
							} else {
								$stat['dirs'] = 1;
							}
						} else {
							unset($stat['dirs']);
						}
					} elseif (!empty($stat['alias']) && !empty($stat['target'])) {
						$stat['dirs'] = isset($this->cache[$stat['target']])
							? intval(isset($this->cache[$stat['target']]['dirs']))
							: $this->subdirsCE($stat['target']);
						
					} elseif ($this->subdirsCE($path)) {
						$stat['dirs'] = 1;
					}
				} else {
					$stat['dirs'] = 1;
				}
				if ($this->options['dirUrlOwn'] === true) {
					$stat['url'] = '#elf_' . $stat['hash'];
				}
			} else {
				// for files - check for thumbnails
				$p = isset($stat['target']) ? $stat['target'] : $path;
				if ($this->tmbURL && !isset($stat['tmb']) && $this->canCreateTmb($p, $stat)) {
					$tmb = $this->gettmb($p, $stat);
					$stat['tmb'] = $tmb ? $tmb : 1;
				}
				
			}
			if (!isset($stat['url']) && $this->URL && $this->encoding) {
				$_path = str_replace($this->separator, '/', substr($path, strlen($this->root) + 1));
				$stat['url'] = rtrim($this->URL, '/') . '/' . str_replace('%2F', '/', rawurlencode((substr(PHP_OS, 0, 3) === 'WIN')? $_path : $this->convEncIn($_path, true)));
			}
		} else {
			if ($isDir) {
				unset($stat['dirs']);
			}
		}
		
		if (!empty($stat['alias']) && !empty($stat['target'])) {
			$stat['thash'] = $this->encode($stat['target']);
			//$this->cache[$stat['target']] = $stat;
			unset($stat['target']);
		}
		
		$this->cache[$path] = $stat;
		
		if ($root && $this->sessionCaching['rootstat']) {
			// to update session cache
			$this->stat($path);
		}
		
		return $stat;
	}
	
	/**
	 * Get stat for folder content and put in cache
	 *
	 * @param  string  $path
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	protected function cacheDir($path) {
		$this->dirsCache[$path] = array();
		$hasDir = false;

		foreach ($this->scandirCE($path) as $p) {
			if (($stat = $this->stat($p)) && empty($stat['hidden'])) {
				if (! $hasDir && $stat['mime'] === 'directory') {
					$hasDir = true;
				}
				$this->dirsCache[$path][] = $p;
			}
		}
		
		$this->updateSubdirsCache($path, $hasDir);
	}
	
	/**
	 * Clean cache
	 *
	 * @return void
	 * @author Dmitry (dio) Levashov
	 **/
	protected function clearcache() {
		$this->cache = $this->dirsCache = array();
	}

	/**
	 * Return file mimetype
	 *
	 * @param  string      $path file path
	 * @param  string|bool $name
	 * @return string
	 * @author Dmitry (dio) Levashov
	 */
	protected function mimetype($path, $name = '') {
		$type = '';
		$nameCheck = false;
		
		if ($name === '') {
			$name = $path;
		} else if ($name === true) {
			$name = $path;
			$nameCheck = true;
		}
		$ext = (false === $pos = strrpos($name, '.')) ? '' : substr($name, $pos + 1);
		if (! $nameCheck && is_readable($path)) {
			if ($this->mimeDetect == 'finfo') {
				if ($type = finfo_file($this->finfo, $path)) {
					if ($ext && preg_match('~^application/(?:octet-stream|(?:x-)?zip)~', $type)) {
						if (isset(elFinderVolumeDriver::$mimetypes[$ext])) $type = elFinderVolumeDriver::$mimetypes[$ext];
					} else if ($ext === 'js' && preg_match('~^text/~', $type)) {
						$type = 'text/javascript';
					}
				} else {
					$type = 'unknown';
				}
			} else if ($this->mimeDetect == 'mime_content_type') {
				$type = mime_content_type($path);
			}
		}
		if (! $type) {
			$type = elFinderVolumeDriver::mimetypeInternalDetect($path);
		}
		
		if ($type === 'unknown' && $this->mimeDetect != 'internal') {
			$type = elFinderVolumeDriver::mimetypeInternalDetect($path);
		}
		
		$type = explode(';', $type);
		$type = trim($type[0]);
		
		if (in_array($type, array('application/x-empty', 'inode/x-empty'))) {
			// finfo return this mime for empty files
			$type = 'text/plain';
		}
		
		// mime type normalization
		$_checkKey = strtolower($ext.':'.$type);
		if (isset($this->options['mimeMap'][$_checkKey])) {
			$type = $this->options['mimeMap'][$_checkKey];
		} else {
			$_checkKey = strtolower($ext.':*');
			if (isset($this->options['mimeMap'][$_checkKey])) {
				$type = $this->options['mimeMap'][$_checkKey];
			}
		}
		
		return $type;
	}
	
	/**
	 * Detect file mimetype using "internal" method or Loading mime.types with $path = ''
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	static protected function mimetypeInternalDetect($path = '') {
		// load default MIME table file "mime.types"
		if (!elFinderVolumeDriver::$mimetypesLoaded) {
			elFinderVolumeDriver::$mimetypesLoaded = true;
			$file = elFinder::$defaultMimefile;
			if ($file === '' || ! is_readable($file)) {
				$file = dirname(__FILE__).DIRECTORY_SEPARATOR.'mime.types';
			}
			if (is_readable($file)) {
				$mimecf = file($file);
				foreach ($mimecf as $line_num => $line) {
					if (!preg_match('/^\s*#/', $line)) {
						$mime = preg_split('/\s+/', $line, -1, PREG_SPLIT_NO_EMPTY);
						for ($i = 1, $size = count($mime); $i < $size ; $i++) {
							if (!isset(elFinderVolumeDriver::$mimetypes[$mime[$i]])) {
								elFinderVolumeDriver::$mimetypes[$mime[$i]] = $mime[0];
							}
						}
					}
				}
			}
		}
		$ext = '';
		if ($path) {
			$pinfo = pathinfo($path); 
			$ext   = isset($pinfo['extension']) ? strtolower($pinfo['extension']) : '';
		}
		return ($ext && isset(elFinderVolumeDriver::$mimetypes[$ext])) ? elFinderVolumeDriver::$mimetypes[$ext] : 'unknown';
	}
	
	/**
	 * Return file/total directory size
	 *
	 * @param  string  $path  file path
	 * @return int
	 * @author Dmitry (dio) Levashov
	 **/
	protected function countSize($path) {
		
		elFinder::extendTimeLimit();
		
		$stat = $this->stat($path);

		if (empty($stat) || !$stat['read'] || !empty($stat['hidden'])) {
			return 'unknown';
		}
		
		if ($stat['mime'] != 'directory') {
			return $stat['size'];
		}
		
		$subdirs = $this->options['checkSubfolders'];
		$this->options['checkSubfolders'] = true;
		$result = 0;
		foreach ($this->getScandir($path) as $stat) {
			$size = $stat['mime'] == 'directory' && $stat['read'] 
				? $this->countSize($this->decode($stat['hash'])) 
				: (isset($stat['size']) ? intval($stat['size']) : 0);
			if ($size > 0) {
				$result += $size;
			}
		}
		$this->options['checkSubfolders'] = $subdirs;
		return $result;
	}
	
	/**
	 * Return true if all mimes is directory or files
	 *
	 * @param  string  $mime1  mimetype
	 * @param  string  $mime2  mimetype
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function isSameType($mime1, $mime2) {
		return ($mime1 == 'directory' && $mime1 == $mime2) || ($mime1 != 'directory' && $mime2 != 'directory');
	}
	
	/**
	 * If file has required attr == $val - return file path,
	 * If dir has child with has required attr == $val - return child path
	 *
	 * @param  string   $path  file path
	 * @param  string   $attr  attribute name
	 * @param  bool     $val   attribute value
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	protected function closestByAttr($path, $attr, $val) {
		$stat = $this->stat($path);
		
		if (empty($stat)) {
			return false;
		}
		
		$v = isset($stat[$attr]) ? $stat[$attr] : false;
		
		if ($v == $val) {
			return $path;
		}

		return $stat['mime'] == 'directory'
			? $this->childsByAttr($path, $attr, $val) 
			: false;
	}
	
	/**
	 * Return first found children with required attr == $val
	 *
	 * @param  string   $path  file path
	 * @param  string   $attr  attribute name
	 * @param  bool     $val   attribute value
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	protected function childsByAttr($path, $attr, $val) {
		foreach ($this->scandirCE($path) as $p) {
			if (($_p = $this->closestByAttr($p, $attr, $val)) != false) {
				return $_p;
			}
		}
		return false;
	}
	
	protected function isMyReload($target = '', $ARGtarget = '') {
		if ($this->rootModified || (! empty($this->ARGS['cmd']) && $this->ARGS['cmd'] === 'parents')) {
			return true;
		}
		if (! empty($this->ARGS['reload'])) {
			if ($ARGtarget === '') {
				$ARGtarget = isset($this->ARGS['target'])? $this->ARGS['target']
					: ((isset($this->ARGS['targets']) && is_array($this->ARGS['targets']) && count($this->ARGS['targets']) === 1)?
						$this->ARGS['targets'][0] : '');
			}
			if ($ARGtarget !== '') {
				$ARGtarget = strval($ARGtarget);
				if ($target === '') {
					return (strpos($ARGtarget, $this->id) === 0);
				} else {
					$target = strval($target);
					return ($target === $ARGtarget);
				}
			}
		}
		return false;
	}
	
	/**
	 * Update subdirs cache data
	 * 
	 * @param string $path
	 * @param bool   $subdirs
	 * 
	 * @returnv void
	 */
	protected function updateSubdirsCache($path, $subdirs) {
		if (isset($this->cache[$path])) {
			if ($subdirs) {
				$this->cache[$path]['dirs'] = 1;
			} else {
				unset($this->cache[$path]['dirs']);
			}
		}
		if ($this->sessionCaching['subdirs']) {
			$this->sessionCache['subdirs'][$path] = $subdirs;
		}
		if ($this->sessionCaching['rootstat'] && $path == $this->root) {
			unset($this->sessionCache['rootstat'][$this->getRootstatCachekey()]);
		}
	}
	
	/*****************  get content *******************/
	
	/**
	 * Return required dir's files info.
	 * If onlyMimes is set - return only dirs and files of required mimes
	 *
	 * @param  string  $path  dir path
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	protected function getScandir($path) {
		$files = array();
		
		!isset($this->dirsCache[$path]) && $this->cacheDir($path);

		foreach ($this->dirsCache[$path] as $p) {
			if (($stat = $this->stat($p)) && empty($stat['hidden'])) {
				$files[] = $stat;
			}
		}

		return $files;
	}


	/**
	 * Return subdirs tree
	 *
	 * @param  string $path parent dir path
	 * @param  int $deep tree deep
	 * @param string $exclude
	 * @return array
	 * @author Dmitry (dio) Levashov
	 */
	protected function gettree($path, $deep, $exclude='') {
		$dirs = array();
		
		!isset($this->dirsCache[$path]) && $this->cacheDir($path);

		foreach ($this->dirsCache[$path] as $p) {
			$stat = $this->stat($p);
			
			if ($stat && empty($stat['hidden']) && $p != $exclude && $stat['mime'] == 'directory') {
				$dirs[] = $stat;
				if ($deep > 0 && !empty($stat['dirs'])) {
					$dirs = array_merge($dirs, $this->gettree($p, $deep-1));
				}
			}
		}

		return $dirs;
	}	
		
	/**
	 * Recursive files search
	 *
	 * @param  string  $path   dir path
	 * @param  string  $q      search string
	 * @param  array   $mimes
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	protected function doSearch($path, $q, $mimes) {
		$result = array();
		
		$timeout = $this->options['searchTimeout']? $this->searchStart + $this->options['searchTimeout'] : 0;
		if ($timeout && $timeout < time()) {
			$this->setError(elFinder::ERROR_SEARCH_TIMEOUT, $this->path($this->encode($path)));
			return $result;
		}
		
		foreach($this->scandirCE($path) as $p) {
			elFinder::extendTimeLimit($this->options['searchTimeout'] + 30);
			
			if ($timeout && ($this->error || $timeout < time())) {
				!$this->error && $this->setError(elFinder::ERROR_SEARCH_TIMEOUT, $this->path($this->encode($path)));
				break;
			}

			
			$stat = $this->stat($p);

			if (!$stat) { // invalid links
				continue;
			}

			if (!empty($stat['hidden']) || !$this->mimeAccepted($stat['mime'], $mimes)) {
				continue;
			}
			
			$name = $stat['name'];

			if ($this->doSearchCurrentQuery['excludes']) {
				foreach($this->doSearchCurrentQuery['excludes'] as $exclude) {
					if ($this->stripos($name, $exclude) !== false) {
						continue 2;
					}
				}
			}

			if ((!$mimes || $stat['mime'] !== 'directory') && $this->stripos($name, $q) !== false) {
				$stat['path'] = $this->path($stat['hash']);
				if ($this->URL && !isset($stat['url'])) {
					$path = str_replace($this->separator, '/', substr($p, strlen($this->root) + 1));
					if ($this->encoding) {
						$path = str_replace('%2F', '/', rawurlencode($this->convEncIn($path, true)));
					} else {
						$path = str_replace('%2F', '/', rawurlencode($path));
					}
					$stat['url'] = $this->URL . $path;
				}
				
				$result[] = $stat;
			}
			if ($stat['mime'] == 'directory' && $stat['read'] && !isset($stat['alias'])) {
				if (! $this->options['searchExDirReg'] || ! preg_match($this->options['searchExDirReg'], $p)) {
					$result = array_merge($result, $this->doSearch($p, $q, $mimes));
				}
			}
		}
		
		return $result;
	}
		
	/**********************  manuipulations  ******************/
		
	/**
	 * Copy file/recursive copy dir only in current volume.
	 * Return new file path or false.
	 *
	 * @param  string  $src   source path
	 * @param  string  $dst   destination dir path
	 * @param  string  $name  new file name (optionaly)
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	protected function copy($src, $dst, $name) {
		
		elFinder::extendTimeLimit();
		
		$srcStat = $this->stat($src);
		
		if (!empty($srcStat['thash'])) {
			$target = $this->decode($srcStat['thash']);
			if (!$this->inpathCE($target, $this->root)) {
				return $this->setError(elFinder::ERROR_COPY, $this->path($srcStat['hash']), elFinder::ERROR_MKOUTLINK);
			}
			$stat   = $this->stat($target);
			$this->clearcache();
			return $stat && $this->symlinkCE($target, $dst, $name)
				? $this->joinPathCE($dst, $name)
				: $this->setError(elFinder::ERROR_COPY, $this->path($srcStat['hash']));
		} 
		
		if ($srcStat['mime'] === 'directory') {
			$testStat = $this->isNameExists($this->joinPathCE($dst, $name));
			$this->clearcache();
			
			if (($testStat && $testStat['mime'] !== 'directory') || (! $testStat && ! $testStat = $this->mkdir($this->encode($dst), $name))) {
				return $this->setError(elFinder::ERROR_COPY, $this->path($srcStat['hash']));
			}
			
			$dst = $this->decode($testStat['hash']);
			
			foreach ($this->getScandir($src) as $stat) {
				if (empty($stat['hidden'])) {
					$name = $stat['name'];
					$_src = $this->decode($stat['hash']);
					if (! $this->copy($_src, $dst, $name)) {
						$this->remove($dst, true); // fall back
						return $this->setError($this->error, elFinder::ERROR_COPY, $this->_path($src));
					}
				}
			}
			
			$this->added[] = $testStat;
			
			return $dst;
		}

		if ($this->options['copyJoin']) {
			$test = $this->joinPathCE($dst, $name);
			if ($testStat = $this->isNameExists($test)) {
				$this->remove($test);
			}
		} else {
			$testStat = false;
		}
		if ($res = $this->convEncOut($this->_copy($this->convEncIn($src), $this->convEncIn($dst), $this->convEncIn($name)))) {
			$path = is_string($res)? $res : $this->joinPathCE($dst, $name);
			$this->clearcache();
			if ($this->ARGS['cmd'] !== 'duplicate') {
				$this->added[] = $this->stat($path);
			}
			return $path;
		}

		return $this->setError(elFinder::ERROR_COPY, $this->path($srcStat['hash']));
	}

	/**
	 * Move file
	 * Return new file path or false.
	 *
	 * @param  string  $src   source path
	 * @param  string  $dst   destination dir path
	 * @param  string  $name  new file name 
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	protected function move($src, $dst, $name) {
		$stat = $this->stat($src);
		$stat['realpath'] = $src;
		$this->rmTmb($stat); // can not do rmTmb() after _move()
		$this->clearcache();
		
		if ($res = $this->convEncOut($this->_move($this->convEncIn($src), $this->convEncIn($dst), $this->convEncIn($name)))) {
			$this->removed[] = $stat;
			if ($stat['mime'] === 'directory') {
				$this->updateSubdirsCache($dst, true);
			}
			return is_string($res)? $res : $this->joinPathCE($dst, $name);
		}

		return $this->setError(elFinder::ERROR_MOVE, $this->path($stat['hash']));
	}

	/**
	 * Copy file from another volume.
	 * Return new file path or false.
	 *
	 * @param  Object  $volume       source volume
	 * @param  string  $src          source file hash
	 * @param  string  $destination  destination dir path
	 * @param  string  $name         file name
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	protected function copyFrom($volume, $src, $destination, $name) {
		
		elFinder::extendTimeLimit();
		
		if (($source = $volume->file($src)) == false) {
			return $this->setError(elFinder::ERROR_COPY, '#'.$src, $volume->error());
		}
		
		$errpath = $volume->path($source['hash']);
		
		if (!$this->nameAccepted($source['name'])) {
			return $this->setError(elFinder::ERROR_COPY, $errpath, elFinder::ERROR_INVALID_NAME);
		}
				
		if (!$source['read']) {
			return $this->setError(elFinder::ERROR_COPY, $errpath, elFinder::ERROR_PERM_DENIED);
		}
		
		if ($source['mime'] == 'directory') {
			$test = $this->isNameExists($this->joinPathCE($destination, $name));
			$this->clearcache();

			if (($test && $test['mime'] != 'directory') || (! $test && ! $test = $this->mkdir($this->encode($destination), $name))) {
				return $this->setError(elFinder::ERROR_COPY, $errpath);
			}
			
			//$path = $this->joinPathCE($destination, $name);
			$path = $this->decode($test['hash']);
			
			foreach ($volume->scandir($src) as $entr) {
				if (!$this->copyFrom($volume, $entr['hash'], $path, $entr['name'])) {
					$this->remove($path, true); // fall back
					return $this->setError($this->error, elFinder::ERROR_COPY, $errpath);
				}
			}
			
			$this->added[] = $test;
		} else {
			// $mime = $source['mime'];
			// $w = $h = 0;
			if (($dim = $volume->dimensions($src))) {
				$s = explode('x', $dim);
				$source['width']  = $s[0];
				$source['height'] = $s[1];
			}
			
			if (($fp = $volume->open($src)) == false
			|| ($path = $this->saveCE($fp, $destination, $name, $source)) == false) {
				$fp && $volume->close($fp, $src);
				return $this->setError(elFinder::ERROR_COPY, $errpath);
			}
			$volume->close($fp, $src);
			
			// MIME check
			$stat = $this->stat($path);
			$mimeByName = $this->mimetype($stat['name'], true);
			if ($stat['mime'] === $mimeByName) {
				$mimeByName = '';
			}
			if (!$this->allowPutMime($stat['mime']) || ($mimeByName && !$this->allowPutMime($mimeByName))) {
				$this->remove($path, true);
				return $this->setError(elFinder::ERROR_UPLOAD_FILE_MIME, $errpath);
			}
			
			$this->added[] = $stat;
		}
		
		return $path;
	}
		
	/**
	 * Remove file/ recursive remove dir
	 *
	 * @param  string  $path   file path
	 * @param  bool    $force  try to remove even if file locked
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function remove($path, $force = false) {
		$stat = $this->stat($path);
		
		if (empty($stat)) {
			return $this->setError(elFinder::ERROR_RM, $path, elFinder::ERROR_FILE_NOT_FOUND);
		}
		
		$stat['realpath'] = $path;
		$this->rmTmb($stat);
		$this->clearcache();
		
		if (!$force && !empty($stat['locked'])) {
			return $this->setError(elFinder::ERROR_LOCKED, $this->path($stat['hash']));
		}
		
		if ($stat['mime'] == 'directory' && empty($stat['thash'])) {
			$ret = $this->delTree($this->convEncIn($path));
			$this->convEncOut();
			if (!$ret) {
				return $this->setError(elFinder::ERROR_RM, $this->path($stat['hash']));
			}
		} else {
			if ($this->convEncOut(!$this->_unlink($this->convEncIn($path)))) {
				return $this->setError(elFinder::ERROR_RM, $this->path($stat['hash']));
			}
		}

		$this->removed[] = $stat;
		return true;
	}
	

	/************************* thumbnails **************************/
		
	/**
	 * Return thumbnail file name for required file
	 *
	 * @param  array  $stat  file stat
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	protected function tmbname($stat) {
		return $stat['hash'].$stat['ts'].'.png';
	}
	
	/**
	 * Return thumnbnail name if exists
	 *
	 * @param  string  $path file path
	 * @param  array   $stat file stat
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	protected function gettmb($path, $stat) {
		if ($this->tmbURL && $this->tmbPath) {
			// file itself thumnbnail
			if (strpos($path, $this->tmbPath) === 0) {
				return basename($path);
			}

			$name = $this->tmbname($stat);
			if (file_exists($this->tmbPath.DIRECTORY_SEPARATOR.$name)) {
				return $name;
			}
		}
		return false;
	}
	
	/**
	 * Return true if thumnbnail for required file can be created
	 *
	 * @param  string  $path  thumnbnail path 
	 * @param  array   $stat  file stat
	 * @param  bool    $checkTmbPath
	 * @return string|bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function canCreateTmb($path, $stat, $checkTmbPath = true) {
		if ((! $checkTmbPath || $this->tmbPathWritable) 
			&& (! $this->tmbPath || strpos($path, $this->tmbPath) === false) // do not create thumnbnail for thumnbnail
		) {
			$mime = strtolower($stat['mime']);
			list($type) = explode('/', $mime);
			if (! empty($this->imgConverter)) {
				if (isset($this->imgConverter[$mime])) {
					return true;
				}
				if (isset($this->imgConverter[$type])) {
					return true;
				}
			}
			return $this->imgLib
				&& ($type === 'image')
				&& ($this->imgLib == 'gd' ? in_array($stat['mime'], array('image/jpeg', 'image/png', 'image/gif', 'image/x-ms-bmp')) : true);
		}
		return false;
	}
	
	/**
	 * Return true if required file can be resized.
	 * By default - the same as canCreateTmb
	 *
	 * @param  string  $path  thumnbnail path 
	 * @param  array   $stat  file stat
	 * @return string|bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected function canResize($path, $stat) {
		return $this->canCreateTmb($path, $stat, false);
	}

	/**
	 * Create thumnbnail and return it's URL on success
	 *
	 * @param  string $path file path
	 * @param $stat
	 * @return false|string
	 * @internal param string $mime file mime type
	 * @author Dmitry (dio) Levashov
	 */
	protected function createTmb($path, $stat) {
		if (!$stat || !$this->canCreateTmb($path, $stat)) {
			return false;
		}

		$name = $this->tmbname($stat);
		$tmb  = $this->tmbPath.DIRECTORY_SEPARATOR.$name;

		$maxlength = -1;
		$imgConverter = null;
		
		// check imgConverter
		$mime = strtolower($stat['mime']);
		list($type) = explode('/', $mime);
		if (isset($this->imgConverter[$mime])) {
			$imgConverter = $this->imgConverter[$mime]['func'];
			if (! empty($this->imgConverter[$mime]['maxlen'])) {
				$maxlength = intval($this->imgConverter[$mime]['maxlen']);
			}
		} else if (isset($this->imgConverter[$type])) {
			$imgConverter = $this->imgConverter[$type]['func'];
			if (! empty($this->imgConverter[$type]['maxlen'])) {
				$maxlength = intval($this->imgConverter[$type]['maxlen']);
			}
		}
		if ($imgConverter && ! is_callable($imgConverter)) {
			return false;
		}

		// copy image into tmbPath so some drivers does not store files on local fs
		if (($src = $this->fopenCE($path, 'rb')) == false) {
			return false;
		}

		if (($trg = fopen($tmb, 'wb')) == false) {
			$this->fcloseCE($src, $path);
			return false;
		}

		stream_copy_to_stream($src, $trg, $maxlength);

		$this->fcloseCE($src, $path);
		fclose($trg);

		// call imgConverter
		if ($imgConverter) {
			if (! call_user_func_array($imgConverter, array($tmb, $stat, $this))) {
				file_exists($tmb) && unlink($tmb);
				return false;
			}
		}

		$result = false;
		
		$tmbSize = $this->tmbSize;
		
		if ($this->imgLib === 'imagick') {
			try {
				$imagickTest = new imagick($tmb);
				$imagickTest->clear();
				$imagickTest = true;
			} catch (Exception $e) {
				$imagickTest = false;
			}
		}
		
		if (($this->imgLib === 'imagick' && ! $imagickTest) || ($s = getimagesize($tmb)) === false) {
			if ($this->imgLib === 'imagick') {
				$bgcolor = $this->options['tmbBgColor'];
				if ($bgcolor === 'transparent') {
					$bgcolor = 'rgba(255, 255, 255, 0.0)';
				}
				try {
					$imagick = new imagick();
					$imagick->setBackgroundColor(new ImagickPixel($bgcolor));
					$imagick->readImage($this->getExtentionByMime($stat['mime'], ':') . $tmb);
					$imagick->setImageFormat('png');
					$imagick->writeImage($tmb);
					$imagick->clear();
					if (($s = getimagesize($tmb)) !== false) {
						$result = true;
					}
				} catch (Exception $e) {}
			}
			if (! $result) {
				file_exists($tmb) && unlink($tmb);
				return false;
			}
			$result = false;
		}

		/* If image smaller or equal thumbnail size - just fitting to thumbnail square */
		if ($s[0] <= $tmbSize && $s[1]	<= $tmbSize) {
			$result = $this->imgSquareFit($tmb, $tmbSize, $tmbSize, 'center', 'middle', $this->options['tmbBgColor'], 'png' );
		} else {
		
			if ($this->options['tmbCrop']) {
		
				$result = $tmb;
				/* Resize and crop if image bigger than thumbnail */
				if (!(($s[0] > $tmbSize && $s[1] <= $tmbSize) || ($s[0] <= $tmbSize && $s[1] > $tmbSize) ) || ($s[0] > $tmbSize && $s[1] > $tmbSize)) {
					$result = $this->imgResize($tmb, $tmbSize, $tmbSize, true, false, 'png');
				}
		
				if ($result && ($s = getimagesize($tmb)) != false) {
					$x = $s[0] > $tmbSize ? intval(($s[0] - $tmbSize)/2) : 0;
					$y = $s[1] > $tmbSize ? intval(($s[1] - $tmbSize)/2) : 0;
					$result = $this->imgCrop($result, $tmbSize, $tmbSize, $x, $y, 'png');
				} else {
					$result = false;
				}
		
			} else {
				$result = $this->imgResize($tmb, $tmbSize, $tmbSize, true, true, 'png');
			}
		
			if ($result) {
				if ($s = getimagesize($tmb)) {
					if ($s[0] !== $tmbSize || $s[1] !== $tmbSize) {
						$result = $this->imgSquareFit($result, $tmbSize, $tmbSize, 'center', 'middle', $this->options['tmbBgColor'], 'png' );
					}
				}
			}
		}
		
		if (!$result) {
			unlink($tmb);
			return false;
		}

		return $name;
	}

	/**
	 * Resize image
	 *
	 * @param  string   $path               image file
	 * @param  int      $width              new width
	 * @param  int      $height             new height
	 * @param  bool	    $keepProportions    crop image
	 * @param  bool	    $resizeByBiggerSide resize image based on bigger side if true
	 * @param  string   $destformat         image destination format
	 * @param  int      $jpgQuality         JEPG quality (1-100)
	 * @param  array    $options            Other extra options
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 * @author Alexey Sukhotin
	 **/
	protected function imgResize($path, $width, $height, $keepProportions = false, $resizeByBiggerSide = true, $destformat = null, $jpgQuality = null, $options = array()) {
		if (($s = getimagesize($path)) == false) {
			return false;
		}

		$result = false;
		
		if (!$jpgQuality) {
			$jpgQuality = $this->options['jpgQuality'];
		}
		
		list($orig_w, $orig_h) = array($s[0], $s[1]);
		list($size_w, $size_h) = array($width, $height);
		
		if (empty($options['unenlarge']) || $orig_w > $size_w || $orig_h > $size_h) {
			if ($keepProportions == true) {
				/* Resizing by biggest side */
				if ($resizeByBiggerSide) {
					if ($orig_w > $orig_h) {
						$size_h = round($orig_h * $width / $orig_w);
						$size_w = $width;
					} else {
						$size_w = round($orig_w * $height / $orig_h);
						$size_h = $height;
					}
				} else {
					if ($orig_w > $orig_h) {
						$size_w = round($orig_w * $height / $orig_h);
						$size_h = $height;
					} else {
						$size_h = round($orig_h * $width / $orig_w);
						$size_w = $width;
					}
				}
			}
		} else {
			$size_w = $orig_w;
			$size_h = $orig_h;
		}

		elFinder::extendTimeLimit(300);
		switch ($this->imgLib) {
			case 'imagick':
				
				try {
					$img = new imagick($path);
				} catch (Exception $e) {
					return false;
				}

				// Imagick::FILTER_BOX faster than FILTER_LANCZOS so use for createTmb
				// resize bench: http://app-mgng.rhcloud.com/9
				// resize sample: http://www.dylanbeattie.net/magick/filters/result.html
				$filter = ($destformat === 'png' /* createTmb */)? Imagick::FILTER_BOX : Imagick::FILTER_LANCZOS;
				
				$ani = ($img->getNumberImages() > 1);
				if ($ani && is_null($destformat)) {
					$img = $img->coalesceImages();
					do {
						$img->resizeImage($size_w, $size_h, $filter, 1);
					} while ($img->nextImage());
					$img = $img->optimizeImageLayers();
					$result = $img->writeImages($path, true);
				} else {
					if ($ani) {
						$img->setFirstIterator();
					}
					if (strtoupper($img->getImageFormat()) === 'JPEG') {
						$img->setImageCompression(imagick::COMPRESSION_JPEG);
						$img->setImageCompressionQuality($jpgQuality);
						if (isset($options['preserveExif']) && ! $options['preserveExif']) {
							try {
								$orientation = $img->getImageOrientation();
							} catch (ImagickException $e) {
								$orientation = 0;
							}
							$img->stripImage();
							if ($orientation) {
								$img->setImageOrientation($orientation);
							}
						}
					}
					$img->resizeImage($size_w, $size_h, $filter, true);
					if ($destformat) {
						$result = $this->imagickImage($img, $path, $destformat, $jpgQuality);
					} else {
						$result = $img->writeImage($path);
					}
				}
				
				$img->clear();

				return $result ? $path : false;

				break;

			case 'convert':
				extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
				$filter = ($destformat === 'png' /* createTmb */)? '-filter Box' : '-filter Lanczos';
				$strip = (isset($options['preserveExif']) && ! $options['preserveExif'])? ' -strip' : '';
				//$cmd = sprintf('convert%s%s +repage %s -resize %dx%d +repage%s %s %s', $coalesce, $jpgQuality, $filter, $size_w, $size_h, $deconstruct, $quotedPath, $quotedDstPath);
				$cmd = sprintf('convert %s%s%s %s -geometry %dx%d! %s %s', $quotedPath, $coalesce, $jpgQuality, $filter, $size_w, $size_h, $deconstruct, $quotedDstPath);
				
				$result = false;
				if ($this->procExec($cmd) === 0) {
					$result = true;
				}
				return $result ? $path : false;

				break;

			case 'gd':
				$img = $this->gdImageCreate($path,$s['mime']);

				if ($img && false != ($tmp = imagecreatetruecolor($size_w, $size_h))) {
				
					$bgNum = false;
					if ($s[2] === IMAGETYPE_GIF && (! $destformat || $destformat === 'gif')) {
						$bgIdx = imagecolortransparent($img);
						if ($bgIdx !== -1) {
							$c = imagecolorsforindex($img, $bgIdx);
							$bgNum = imagecolorallocate($tmp, $c['red'], $c['green'], $c['blue']);
							imagefill($tmp, 0, 0, $bgNum);
							imagecolortransparent($tmp, $bgNum);
						}
					}
					if ($bgNum === false) {
						$this->gdImageBackground($tmp, 'transparent');
					}
					
					if (!imagecopyresampled($tmp, $img, 0, 0, 0, 0, $size_w, $size_h, $s[0], $s[1])) {
						return false;
					}
		
					$result = $this->gdImage($tmp, $path, $destformat, $s['mime'], $jpgQuality);

					imagedestroy($img);
					imagedestroy($tmp);

					return $result ? $path : false;

				}
				break;
		}
		
		return false;
  	}
  
	/**
	 * Crop image
	 *
	 * @param  string   $path               image file
	 * @param  int      $width              crop width
	 * @param  int      $height             crop height
	 * @param  bool	    $x                  crop left offset
	 * @param  bool	    $y                  crop top offset
	 * @param  string   $destformat         image destination format
	 * @param  int      $jpgQuality         JEPG quality (1-100)
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 * @author Alexey Sukhotin
	 **/
  	protected function imgCrop($path, $width, $height, $x, $y, $destformat = null, $jpgQuality = null) {
		if (($s = getimagesize($path)) == false) {
			return false;
		}

		$result = false;
		
		if (!$jpgQuality) {
			$jpgQuality = $this->options['jpgQuality'];
		}

		elFinder::extendTimeLimit(300);
		switch ($this->imgLib) {
			case 'imagick':
				
				try {
					$img = new imagick($path);
				} catch (Exception $e) {
					return false;
				}
				
				$ani = ($img->getNumberImages() > 1);
				if ($ani && is_null($destformat)) {
					$img = $img->coalesceImages();
					do {
						$img->setImagePage($s[0], $s[1], 0, 0);
						$img->cropImage($width, $height, $x, $y);
						$img->setImagePage($width, $height, 0, 0);
					} while ($img->nextImage());
					$img = $img->optimizeImageLayers();
					$result = $img->writeImages($path, true);
				} else {
					if ($ani) {
						$img->setFirstIterator();
					}
					$img->setImagePage($s[0], $s[1], 0, 0);
					$img->cropImage($width, $height, $x, $y);
					$img->setImagePage($width, $height, 0, 0);
					$result = $this->imagickImage($img, $path, $destformat, $jpgQuality);
				}
				
				$img->clear();

				return $result ? $path : false;

				break;

			case 'convert':
				extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
				$cmd = sprintf('convert %s%s%s -crop %dx%d+%d+%d%s %s', $quotedPath, $coalesce, $jpgQuality, $width, $height, $x, $y, $deconstruct, $quotedDstPath);
				
				$result = false;
				if ($this->procExec($cmd) === 0) {
					$result = true;
				}
				return $result ? $path : false;

				break;

			case 'gd':
				$img = $this->gdImageCreate($path,$s['mime']);

				if ($img && false != ($tmp = imagecreatetruecolor($width, $height))) {
					
					$bgNum = false;
					if ($s[2] === IMAGETYPE_GIF && (! $destformat || $destformat === 'gif')) {
						$bgIdx = imagecolortransparent($img);
						if ($bgIdx !== -1) {
							$c = imagecolorsforindex($img, $bgIdx);
							$bgNum = imagecolorallocate($tmp, $c['red'], $c['green'], $c['blue']);
							imagefill($tmp, 0, 0, $bgNum);
							imagecolortransparent($tmp, $bgNum);
						}
					}
					if ($bgNum === false) {
						$this->gdImageBackground($tmp, 'transparent');
					}

					$size_w = $width;
					$size_h = $height;

					if ($s[0] < $width || $s[1] < $height) {
						$size_w = $s[0];
						$size_h = $s[1];
					}

					if (!imagecopy($tmp, $img, 0, 0, $x, $y, $size_w, $size_h)) {
						return false;
					}
					
					$result = $this->gdImage($tmp, $path, $destformat, $s['mime'], $jpgQuality);

					imagedestroy($img);
					imagedestroy($tmp);

					return $result ? $path : false;

				}
				break;
		}

		return false;
	}

	/**
	 * Put image to square
	 *
	 * @param  string $path image file
	 * @param  int $width square width
	 * @param  int $height square height
	 * @param int|string $align reserved
	 * @param int|string $valign reserved
	 * @param  string $bgcolor square background color in #rrggbb format
	 * @param  string $destformat image destination format
	 * @param  int $jpgQuality JEPG quality (1-100)
	 * @return false|string
	 * @author Dmitry (dio) Levashov
	 * @author Alexey Sukhotin
	 */
	protected function imgSquareFit($path, $width, $height, $align = 'center', $valign = 'middle', $bgcolor = '#0000ff', $destformat = null, $jpgQuality = null) {
		if (($s = getimagesize($path)) == false) {
			return false;
		}

		$result = false;

		/* Coordinates for image over square aligning */
		$y = ceil(abs($height - $s[1]) / 2); 
		$x = ceil(abs($width - $s[0]) / 2);

		if (!$jpgQuality) {
			$jpgQuality = $this->options['jpgQuality'];
		}

		elFinder::extendTimeLimit(300);
		switch ($this->imgLib) {
			case 'imagick':
				try {
					$img = new imagick($path);
				} catch (Exception $e) {
					return false;
				}
				
				if ($bgcolor === 'transparent') {
					$bgcolor = 'rgba(255, 255, 255, 0.0)';
				}
				$ani = ($img->getNumberImages() > 1);
				if ($ani && is_null($destformat)) {
					$img1 = new Imagick();
					$img1->setFormat('gif');
					$img = $img->coalesceImages();
					do {
						$gif = new Imagick();
						$gif->newImage($width, $height, new ImagickPixel($bgcolor));
						$gif->setImageColorspace($img->getImageColorspace());
						$gif->setImageFormat('gif');
						$gif->compositeImage( $img, imagick::COMPOSITE_OVER, $x, $y );
						$gif->setImageDelay($img->getImageDelay());
						$gif->setImageIterations($img->getImageIterations());
						$img1->addImage($gif);
						$gif->clear();
					} while ($img->nextImage());
					$img1 = $img1->optimizeImageLayers();
					$result = $img1->writeImages($path, true);
				} else {
					if ($ani) {
						$img->setFirstIterator();
					}
					$img1 = new Imagick();
					$img1->newImage($width, $height, new ImagickPixel($bgcolor));
					$img1->setImageColorspace($img->getImageColorspace());
					$img1->compositeImage( $img, imagick::COMPOSITE_OVER, $x, $y );
					$result = $this->imagickImage($img1, $path, $destformat, $jpgQuality);
				}
				
				$img1->clear();
				$img->clear();
				return $result ? $path : false;

				break;

			case 'convert':
				extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
				if ($bgcolor === 'transparent') {
					$bgcolor = 'rgba(255, 255, 255, 0.0)';
				}
				$cmd = sprintf('convert -size %dx%d "xc:%s" png:- | convert%s%s png:-  %s -geometry +%d+%d -compose over -composite%s %s', $width, $height, $bgcolor, $coalesce, $jpgQuality, $quotedPath, $x, $y, $deconstruct, $quotedDstPath);
				
				$result = false;
				if ($this->procExec($cmd) === 0) {
					$result = true;
				}
				return $result ? $path : false;

				break;

			case 'gd':
				$img = $this->gdImageCreate($path,$s['mime']);

				if ($img &&  false != ($tmp = imagecreatetruecolor($width, $height))) {

					$this->gdImageBackground($tmp, $bgcolor);
					if ($bgcolor === 'transparent' && ($destformat === 'png' || $s[2] === IMAGETYPE_PNG)) {
						$bgNum = imagecolorallocatealpha($tmp, 255, 255, 255, 127);
						imagefill($tmp, 0, 0, $bgNum);
					}

					if (!imagecopy($tmp, $img, $x, $y, 0, 0, $s[0], $s[1])) {
						return false;
					}

					$result = $this->gdImage($tmp, $path, $destformat, $s['mime'], $jpgQuality);

					imagedestroy($img);
					imagedestroy($tmp);

					return $result ? $path : false;
				}
				break;
		}

		return false;
	}

	/**
	 * Rotate image
	 *
	 * @param  string   $path               image file
	 * @param  int      $degree             rotete degrees
	 * @param  string   $bgcolor            square background color in #rrggbb format
	 * @param  string   $destformat         image destination format
	 * @param  int      $jpgQuality         JEPG quality (1-100)
	 * @return string|false
	 * @author nao-pon
	 * @author Troex Nevelin
	 **/
	protected function imgRotate($path, $degree, $bgcolor = '#ffffff', $destformat = null, $jpgQuality = null) {
		if (($s = getimagesize($path)) == false || $degree % 360 === 0) {
			return false;
		}

		$result = false;

		// try lossless rotate
		if ($degree % 90 === 0 && in_array($s[2], array(IMAGETYPE_JPEG, IMAGETYPE_JPEG2000))) {
			$count = ($degree / 90) % 4;
			$exiftran = array(
				1 => '-9',
				2 => '-1',
				3 => '-2'
			);
			$jpegtran = array(
				1 => '90',
				2 => '180',
				3 => '270'
			);
			$quotedPath = escapeshellarg($path);
			$cmds = array();
			if ($this->procExec('exiftran -h') === 0) {
				$cmds[] = 'exiftran -i '.$exiftran[$count].' '.$path;
			}
			if ($this->procExec('jpegtran -version') === 0) {
				$cmds[] = 'jpegtran -rotate '.$jpegtran[$count].' -copy all -outfile '.$quotedPath.' '.$quotedPath;
			}
			foreach($cmds as $cmd) {
				if ($this->procExec($cmd) === 0) {
					$result = true;
					break;
				}
			}
			if ($result) {
				return $path;
			}
		}

		if (!$jpgQuality) {
			$jpgQuality = $this->options['jpgQuality'];
		}

		elFinder::extendTimeLimit(300);
		switch ($this->imgLib) {
			case 'imagick':
				try {
					$img = new imagick($path);
				} catch (Exception $e) {
					return false;
				}

				if ($s[2] === IMAGETYPE_GIF || $s[2] === IMAGETYPE_PNG) {
					$bgcolor = 'rgba(255, 255, 255, 0.0)';
				}
				if ($img->getNumberImages() > 1) {
					$img = $img->coalesceImages();
					do {
						$img->rotateImage(new ImagickPixel($bgcolor), $degree);
					} while ($img->nextImage());
					$img = $img->optimizeImageLayers();
					$result = $img->writeImages($path, true);
				} else {
					$img->rotateImage(new ImagickPixel($bgcolor), $degree);
					$result = $this->imagickImage($img, $path, $destformat, $jpgQuality);
				}
				$img->clear();
				return $result ? $path : false;

				break;

			case 'convert':
				extract($this->imageMagickConvertPrepare($path, $destformat, $jpgQuality, $s));
				if ($s[2] === IMAGETYPE_GIF || $s[2] === IMAGETYPE_PNG) {
					$bgcolor = 'rgba(255, 255, 255, 0.0)';
				}
				$cmd = sprintf('convert %s%s%s -background "%s" -rotate %d%s %s', $quotedPath, $coalesce, $jpgQuality, $bgcolor, $degree, $deconstruct, $quotedDstPath);
				
				$result = false;
				if ($this->procExec($cmd) === 0) {
					$result = true;
				}
				return $result ? $path : false;

				break;

			case 'gd':
				$img = $this->gdImageCreate($path,$s['mime']);

				$degree = 360 - $degree;
				
				$bgNum = -1;
				$bgIdx = false;
				if ($s[2] === IMAGETYPE_GIF) {
					$bgIdx = imagecolortransparent($img);
					if ($bgIdx !== -1) {
						$c = imagecolorsforindex($img, $bgIdx);
						$w = imagesx($img);
						$h = imagesy($img);
						$newImg = imagecreatetruecolor($w, $h);
						imagepalettecopy($newImg, $img);
						$bgNum = imagecolorallocate($newImg, $c['red'], $c['green'], $c['blue']);
						imagefill($newImg, 0, 0, $bgNum);
						imagecolortransparent($newImg, $bgNum);
						imagecopy($newImg, $img, 0, 0, 0, 0, $w, $h);
						imagedestroy($img);
						$img = $newImg;
						$newImg = null;
					}
				} else if ($s[2] === IMAGETYPE_PNG) {
					$bgNum = imagecolorallocatealpha($img, 255, 255, 255, 127);
				}
				if ($bgNum === -1) {
					list($r, $g, $b) = sscanf($bgcolor, "#%02x%02x%02x");
					$bgNum = imagecolorallocate($img, $r, $g, $b);
				}
				
				$tmp = imageRotate($img, $degree, $bgNum);
				if ($bgIdx !== -1) {
					imagecolortransparent($tmp, $bgNum);
				}

				$result = $this->gdImage($tmp, $path, $destformat, $s['mime'], $jpgQuality);

				imageDestroy($img);
				imageDestroy($tmp);

				return $result ? $path : false;

				break;
		}

		return false;
	}

	/**
	 * Execute shell command
	 *
	 * @param  string $command command line
	 * @param  array $output stdout strings
	 * @param array|int $return_var process exit code
	 * @param  array $error_output stderr strings
	 * @return int exit code
	 * @author Alexey Sukhotin
	 */
	protected function procExec($command , array &$output = null, &$return_var = -1, array &$error_output = null) {

		static $allowed = null;
		
		if ($allowed === null) {
			if ($allowed = function_exists('proc_open')) {
				if ($disabled = ini_get('disable_functions')) {
					$funcs = array_map('trim', explode(',', $disabled));
					$allowed = ! in_array('proc_open', $funcs);
				}
			}
		}
		
		if (! $allowed) {
			$return_var = -1;
			return $return_var;
		}
		
		if (! $command) {
			$return_var = 0;
			return $return_var;
		}
		
		$descriptorspec = array(
			0 => array("pipe", "r"),  // stdin
			1 => array("pipe", "w"),  // stdout
			2 => array("pipe", "w")   // stderr
		);

		$process = proc_open($command, $descriptorspec, $pipes, null, null);

		if (is_resource($process)) {

			fclose($pipes[0]);

			$tmpout = '';
			$tmperr = '';

			$output = stream_get_contents($pipes[1]);
			$error_output = stream_get_contents($pipes[2]);

			fclose($pipes[1]);
			fclose($pipes[2]);
			$return_var = proc_close($process);

		} else {
			$return_var = -1;
		}
		
		return $return_var;
		
	}

	/**
	 * Remove thumbnail, also remove recursively if stat is directory
	 *
	 * @param  string  $stat  file stat
	 * @return void
	 * @author Dmitry (dio) Levashov
	 * @author Naoki Sawada
	 * @author Troex Nevelin
	 **/
	protected function rmTmb($stat) {
		if ($stat['mime'] === 'directory') {
			foreach ($this->scandirCE($this->decode($stat['hash'])) as $p) {
				elFinder::extendTimeLimit(30);
				$name = $this->basenameCE($p);
				$name != '.' && $name != '..' && $this->rmTmb($this->stat($p));
			}
		} else if (!empty($stat['tmb']) && $stat['tmb'] != "1") {
			$tmb = $this->tmbPath.DIRECTORY_SEPARATOR.$stat['tmb'];
			file_exists($tmb) && unlink($tmb);
			clearstatcache();
		}
	}
	
	/**
	 * Create an gd image according to the specified mime type
	 *
	 * @param string $path image file
	 * @param string $mime
	 * @return gd image resource identifier
	 */
	protected function gdImageCreate($path,$mime){
		switch($mime){
			case 'image/jpeg':
			return imagecreatefromjpeg($path);

			case 'image/png':
			return imagecreatefrompng($path);

			case 'image/gif':
			return imagecreatefromgif($path);

			case 'image/x-ms-bmp':
			if (!function_exists('imagecreatefrombmp')) {
				include_once dirname(__FILE__).'/libs/GdBmp.php';
			}
			return imagecreatefrombmp($path);
			
			case 'image/xbm':
			return imagecreatefromxbm($path);
			
			case 'image/xpm':
			return imagecreatefromxpm($path);
		}
		return false;
	}

	/**
	 * Output gd image to file
	 *
	 * @param resource $image gd image resource
	 * @param string $filename The path to save the file to.
	 * @param string $destformat The Image type to use for $filename
	 * @param string $mime The original image mime type
	 * @param int $jpgQuality JEPG quality (1-100)
	 * @return bool
	 */
	protected function gdImage($image, $filename, $destformat, $mime, $jpgQuality = null ){

		if (! $jpgQuality) {
			$jpgQuality = $this->options['jpgQuality'];
		}
		if ($destformat) {
			switch ($destformat) {
				case 'jpg':
					$mime = 'image/jpeg';
					break;
				case 'gif':
					$mime = 'image/gif';
					break;
				case 'png':
				default:
					$mime = 'image/png';
					break;
			}
		}
		switch ($mime) {
			case 'image/gif':
				return imagegif($image, $filename);
			case 'image/jpeg':
				return imagejpeg($image, $filename, $jpgQuality);
			case 'image/wbmp':
				return imagewbmp($image, $filename);
			case 'image/png':
			default:
				return imagepng($image, $filename);
		}
	}

	/**
	 * Output imagick image to file
	 *
	 * @param resource $img imagick image resource
	 * @param string $filename The path to save the file to.
	 * @param string $destformat The Image type to use for $filename
	 * @param int $jpgQuality JEPG quality (1-100)
	 * @return bool
	 */
	protected function imagickImage($img, $filename, $destformat, $jpgQuality = null ){

		if (!$jpgQuality) {
			$jpgQuality = $this->options['jpgQuality'];
		}
		
		try {
			if ($destformat) {
				if ($destformat === 'gif') {
					$img->setImageFormat('gif');
				} else if ($destformat === 'png') {
					$img->setImageFormat('png');
				} else if ($destformat === 'jpg') {
					$img->setImageFormat('jpeg');
				}
			}
			if (strtoupper($img->getImageFormat()) === 'JPEG') {
				$img->setImageCompression(imagick::COMPRESSION_JPEG);
				$img->setImageCompressionQuality($jpgQuality);
				try {
					$orientation = $img->getImageOrientation();
				} catch (ImagickException $e) {
					$orientation = 0;
				}
				$img->stripImage();
				if ($orientation) {
					$img->setImageOrientation($orientation);
				}
			}
			$result = $img->writeImage($filename);
		} catch (Exception $e) {
			$result = false;
		}
		
		return $result;
	}

	/**
	 * Assign the proper background to a gd image
	 *
	 * @param resource $image gd image resource
	 * @param string $bgcolor background color in #rrggbb format
	 */
	protected function gdImageBackground($image, $bgcolor){
	
		if ($bgcolor === 'transparent'){
			imagealphablending($image, false);
			imagesavealpha($image, true);
			
			/***** サムネール等のPNG画像ではリサイズした画像の空白背景部分が透過にならず黒になるバグがあるため空白背景部分に背景色を設定する by magic3 *****/
			$bgcolor1 = imagecolorallocatealpha($image, 0, 0, 0, 127);
			imagefill($image, 0, 0, $bgcolor1);
			/***** ここまで *****/
		} else {
			list($r, $g, $b) = sscanf($bgcolor, "#%02x%02x%02x");
			$bgcolor1 = imagecolorallocate($image, $r, $g, $b);
			imagefill($image, 0, 0, $bgcolor1);
		}
	}

	/**
	 * Prepare variables for exec convert of ImageMagick
	 *
	 * @param  string  $path
	 * @param  string  $destformat
	 * @param  int     $jpgQuality
	 * @param  array   $imageSize
	 * @return array
	 */
	protected function imageMagickConvertPrepare($path, $destformat, $jpgQuality, $imageSize = null) {
		if (is_null($imageSize)) {
			$imageSize = getimagesize($path);
		}
		if (!$imageSize) {
			return array();
		}
		$srcType = $this->getExtentionByMime($imageSize['mime'], ':');
		$ani = false;
		$cmd = 'identify ' . escapeshellarg($srcType . $path);
		if ($this->procExec($cmd, $o) === 0) {
			$ani = preg_split('/(?:\r\n|\n|\r)/', trim($o));
			if (count($ani) < 2) {
				$ani = false;
			}
		}
		$coalesce = $index = '';
		$deconstruct = ' +repage';
		if ($ani) {
			if (is_null($destformat)) {
				$coalesce = ' -coalesce -repage 0x0';
				$deconstruct = ' +repage -deconstruct -layers optimize';
			} else {
				$index = '[0]';
				if ($srcType === 'ico:') {
					foreach($ani as $_i => $_info) {
						if (preg_match('/ (\d+)x(\d+) /', $_info, $m)) {
							if ($m[1] == $imageSize[0] && $m[2] == $imageSize[1]) {
								$index = '[' . $_i . ']';
								break;
							}
						}
					}
				}
			}
		}
		if ($imageSize[2] === IMAGETYPE_JPEG || $imageSize[2] === IMAGETYPE_JPEG2000) {
			$jpgQuality = ' -quality ' . $jpgQuality;
		} else {
			$jpgQuality = '';
		}
		$quotedPath = escapeshellarg($srcType . $path . $index);
		$quotedDstPath = escapeshellarg(($destformat? ($destformat . ':') : $srcType) . $path);
		return compact('ani', 'index', 'coalesce', 'deconstruct', 'jpgQuality', 'quotedPath', 'quotedDstPath');
	}

	/*********************** misc *************************/
	
	/**
	 * Return smart formatted date
	 *
	 * @param  int     $ts  file timestamp
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	// protected function formatDate($ts) {
	// 	if ($ts > $this->today) {
	// 		return 'Today '.date($this->options['timeFormat'], $ts);
	// 	}
	// 	
	// 	if ($ts > $this->yesterday) {
	// 		return 'Yesterday '.date($this->options['timeFormat'], $ts);
	// 	} 
	// 	
	// 	return date($this->options['dateFormat'], $ts);
	// }

	/**
	* Find position of first occurrence of string in a string with multibyte support
	*
	* @param  string  $haystack  The string being checked.
	* @param  string  $needle    The string to find in haystack.
	* @param  int     $offset    The search offset. If it is not specified, 0 is used.
	* @return int|bool
	* @author Alexey Sukhotin
	**/
	protected function stripos($haystack , $needle , $offset = 0) {
		if (function_exists('mb_stripos')) {
			return mb_stripos($haystack , $needle , $offset, 'UTF-8');
		} else if (function_exists('mb_strtolower') && function_exists('mb_strpos')) {
			return mb_strpos(mb_strtolower($haystack, 'UTF-8'), mb_strtolower($needle, 'UTF-8'), $offset);
		} 
		return stripos($haystack , $needle , $offset);
	}

	/**
	 * Get server side available archivers
	 * 
	 * @param bool $use_cache
	 * @return array
	 */
	protected function getArchivers($use_cache = true) {

		$sessionKey = 'ARCHIVERS_CACHE';
		if ($use_cache && isset($this->sessionCache[$sessionKey]) && is_array($this->sessionCache[$sessionKey])) {
			return $this->sessionCache[$sessionKey];
		}
		
		$arcs = array(
			'create'  => array(),
			'extract' => array()
		);
		
		if ($this->procExec('') === 0) {
		
			$this->procExec('tar --version', $o, $ctar);
			
			if ($ctar == 0) {
				$arcs['create']['application/x-tar']  = array('cmd' => 'tar', 'argc' => '-cf', 'ext' => 'tar');
				$arcs['extract']['application/x-tar'] = array('cmd' => 'tar', 'argc' => '-xf', 'ext' => 'tar');
				unset($o);
				$test = $this->procExec('gzip --version', $o, $c);
				if ($c == 0) {
					$arcs['create']['application/x-gzip']  = array('cmd' => 'tar', 'argc' => '-czf', 'ext' => 'tgz');
					$arcs['extract']['application/x-gzip'] = array('cmd' => 'tar', 'argc' => '-xzf', 'ext' => 'tgz');
				}
				unset($o);
				$test = $this->procExec('bzip2 --version', $o, $c);
				if ($c == 0) {
					$arcs['create']['application/x-bzip2']  = array('cmd' => 'tar', 'argc' => '-cjf', 'ext' => 'tbz');
					$arcs['extract']['application/x-bzip2'] = array('cmd' => 'tar', 'argc' => '-xjf', 'ext' => 'tbz');
				}
				unset($o);
				$test = $this->procExec('xz --version', $o, $c);
				if ($c == 0) {
					$arcs['create']['application/x-xz']  = array('cmd' => 'tar', 'argc' => '-cJf', 'ext' => 'xz');
					$arcs['extract']['application/x-xz'] = array('cmd' => 'tar', 'argc' => '-xJf', 'ext' => 'xz');
				}
			}
			unset($o);
			$this->procExec('zip -v', $o, $c);
			if ($c == 0) {
				$arcs['create']['application/zip']  = array('cmd' => 'zip', 'argc' => '-r9', 'ext' => 'zip');
			}
			unset($o);
			$this->procExec('unzip --help', $o, $c);
			if ($c == 0) {
				$arcs['extract']['application/zip'] = array('cmd' => 'unzip', 'argc' => '',  'ext' => 'zip');
			}
			unset($o);
			$this->procExec('rar --version', $o, $c);
			if ($c == 0 || $c == 7) {
				$arcs['create']['application/x-rar']  = array('cmd' => 'rar', 'argc' => 'a -inul', 'ext' => 'rar');
				$arcs['extract']['application/x-rar'] = array('cmd' => 'rar', 'argc' => 'x -y',    'ext' => 'rar');
			} else {
				unset($o);
				$test = $this->procExec('unrar', $o, $c);
				if ($c==0 || $c == 7) {
					$arcs['extract']['application/x-rar'] = array('cmd' => 'unrar', 'argc' => 'x -y', 'ext' => 'rar');
				}
			}
			unset($o);
			$this->procExec('7za --help', $o, $c);
			if ($c == 0) {
				$arcs['create']['application/x-7z-compressed']  = array('cmd' => '7za', 'argc' => 'a', 'ext' => '7z');
				$arcs['extract']['application/x-7z-compressed'] = array('cmd' => '7za', 'argc' => 'x -y', 'ext' => '7z');
				
				if (empty($arcs['create']['application/zip'])) {
					$arcs['create']['application/zip'] = array('cmd' => '7za', 'argc' => 'a -tzip', 'ext' => 'zip');
				}
				if (empty($arcs['extract']['application/zip'])) {
					$arcs['extract']['application/zip'] = array('cmd' => '7za', 'argc' => 'x -tzip -y', 'ext' => 'zip');
				}
				if (empty($arcs['create']['application/x-tar'])) {
					$arcs['create']['application/x-tar'] = array('cmd' => '7za', 'argc' => 'a -ttar', 'ext' => 'tar');
				}
				if (empty($arcs['extract']['application/x-tar'])) {
					$arcs['extract']['application/x-tar'] = array('cmd' => '7za', 'argc' => 'x -ttar -y', 'ext' => 'tar');
				}
			} else if (substr(PHP_OS,0,3) === 'WIN') {
				// check `7z` for Windows server.
				unset($o);
				$this->procExec('7z', $o, $c);
				if ($c == 0) {
					$arcs['create']['application/x-7z-compressed']  = array('cmd' => '7z', 'argc' => 'a', 'ext' => '7z');
					$arcs['extract']['application/x-7z-compressed'] = array('cmd' => '7z', 'argc' => 'x -y', 'ext' => '7z');
					
					if (empty($arcs['create']['application/zip'])) {
						$arcs['create']['application/zip'] = array('cmd' => '7z', 'argc' => 'a -tzip', 'ext' => 'zip');
					}
					if (empty($arcs['extract']['application/zip'])) {
						$arcs['extract']['application/zip'] = array('cmd' => '7z', 'argc' => 'x -tzip -y', 'ext' => 'zip');
					}
					if (empty($arcs['create']['application/x-tar'])) {
						$arcs['create']['application/x-tar'] = array('cmd' => '7z', 'argc' => 'a -ttar', 'ext' => 'tar');
					}
					if (empty($arcs['extract']['application/x-tar'])) {
						$arcs['extract']['application/x-tar'] = array('cmd' => '7z', 'argc' => 'x -ttar -y', 'ext' => 'tar');
					}
				}
			}
		
		}
		
		// Use PHP ZipArchive Class
		if (class_exists('ZipArchive', false)) {
			if (empty($arcs['create']['application/zip'])) {
				$arcs['create']['application/zip']  = array('cmd' => 'phpfunction', 'argc' => array('self', 'zipArchiveZip'), 'ext' => 'zip');
			}
			if (empty($arcs['extract']['application/zip'])) {
				$arcs['extract']['application/zip'] = array('cmd' => 'phpfunction', 'argc' => array('self', 'zipArchiveUnzip'), 'ext' => 'zip');
			}
		}
		
		$this->sessionCache[$sessionKey] = $arcs;
		return $arcs;
	}

	/**
	 * Resolve relative / (Unix-like)absolute path
	 * 
	 * @param string $path  target path
	 * @param string $base  base path
	 * @return string
	 */
	protected function getFullPath($path, $base) {
		$separator = $this->separator;
		$systemroot = $this->systemRoot;

		if ($base[0] === $separator && strpos($base, 0, strlen($systemroot)) !== $systemroot) {
			$base = $systemroot . substr($base, 1);
		}
		
		// 'Here'
		if ($path === '' || $path === '.' . $separator) return $base;
		
		$sepquoted = preg_quote($separator, '#');

		if (substr($path, 0, 3) === '..' . $separator) {
			$path = $base . $separator . $path;
		}
		// normalize `/../`
		$normreg = '#('.$sepquoted.')[^'.$sepquoted.']+'.$sepquoted.'\.\.'.$sepquoted.'#'; // '#(/)[^\/]+/\.\./#'
		while(preg_match($normreg, $path)) {
			$path = preg_replace($normreg, '$1', $path, 1);
		}
		
		// Absolute path
		if ($path[0] === $separator || strpos($path, $systemroot) === 0) {
			return $path;
		}
		
		$preg_separator = '#' . $sepquoted . '#';
		
		// Relative path from 'Here'
		if (substr($path, 0, 2) === '.' . $separator || $path[0] !== '.') {
			$arrn = preg_split($preg_separator, $path, -1, PREG_SPLIT_NO_EMPTY);
			if ($arrn[0] !== '.') {
				array_unshift($arrn, '.');
			}
			$arrn[0] = $base;
			return join($separator, $arrn);
		}
		
		return $path;
	}

	/**
	 * Remove directory recursive on local file system
	 *
	 * @param string $dir Target dirctory path
	 * @return boolean
	 * @author Naoki Sawada
	 */
	public function rmdirRecursive($dir) {
		return self::localRmdirRecursive($dir);
	}

	/**
	 * Create archive and return its path
	 *
	 * @param  string  $dir    target dir
	 * @param  array   $files  files names list
	 * @param  string  $name   archive name
	 * @param  array   $arc    archiver options
	 * @return string|bool
	 * @author Dmitry (dio) Levashov, 
	 * @author Alexey Sukhotin
	 * @author Naoki Sawada
	 **/
	protected function makeArchive($dir, $files, $name, $arc) {
		if ($arc['cmd'] === 'phpfunction') {
			if (is_callable($arc['argc'])) {
				call_user_func_array($arc['argc'], array($dir, $files, $name));
			}
		} else {
			$cwd = getcwd();
			if (chdir($dir)) {
				foreach($files as $i => $file) {
					$files[$i] = '.'.DIRECTORY_SEPARATOR.$file;
				}
				$files = array_map('escapeshellarg', $files);
				
				$cmd = $arc['cmd'].' '.$arc['argc'].' '.escapeshellarg($name).' '.implode(' ', $files);
				$this->procExec($cmd, $o, $c);
				chdir($cwd);
			} else {
				return false;
			}
		}
		$path = $dir.DIRECTORY_SEPARATOR.$name;
		return file_exists($path) ? $path : false;
	}
	
	/**
	 * Unpack archive
	 *
	 * @param  string  $path   archive path
	 * @param  array   $arc    archiver command and arguments (same as in $this->archivers)
	 * @param  bool    $remove remove archive ( unlink($path) )
	 * @return void
	 * @author Dmitry (dio) Levashov
	 * @author Alexey Sukhotin
	 * @author Naoki Sawada
	 **/
	protected function unpackArchive($path, $arc, $remove = true) {
		$dir = dirname($path);
		if ($arc['cmd'] === 'phpfunction') {
			if (is_callable($arc['argc'])) {
				call_user_func_array($arc['argc'], array($path, $dir));
			}
		} else {
			$cwd = getcwd();
			if (chdir($dir)) {
				$cmd = $arc['cmd'].' '.$arc['argc'].' '.escapeshellarg(basename($path));
				$this->procExec($cmd, $o, $c);
				chdir($cwd);
			}
		}
		$remove && unlink($path);
	}

	/**
	 * Check and filter the extracted items
	 * 
	 * @param  string $path    target local path
	 * @param  array  $checks  types to check default: ['symlink', 'name', 'writable', 'mime']
	 * @return array  ['symlinks' => [], 'names' => [], 'writables' => [], 'mimes' => [], 'rmNames' => [], 'totalSize' => 0]
	 * @author Naoki Sawada
	 */
	protected function checkExtractItems($path, $checks = null) {
		if (is_null($checks) || ! is_array($checks)) {
			$checks = array('symlink', 'name', 'writable', 'mime');
		}
		$chkSymlink = in_array('symlink', $checks);
		$chkName = in_array('name', $checks);
		$chkWritable = in_array('writable', $checks);
		$chkMime = in_array('mime', $checks);
		
		$res = array(
			'symlinks' => array(),
			'names' => array(),
			'writables' => array(),
			'mimes' => array(),
			'rmNames' => array(),
			'totalSize' => 0
		);
		
		if (is_dir($path)) {
			foreach (self::localScandir($path) as $name) {
				$p = $path.DIRECTORY_SEPARATOR.$name;
				if ($chkSymlink && is_link($p)) {
					self::localRmdirRecursive($p);
					$res['symlinks'][] = $p;
					$res['rmNames'][] = $name;
					continue;
				}
				$isDir = is_dir($p);
				if ($chkName && ! $this->nameAccepted($name)) {
					self::localRmdirRecursive($p);
					$res['names'][] = $p;
					$res['rmNames'][] = $name;
					continue;
				}
				if ($chkWritable && ! $this->attr($p, 'write', null, $isDir)) {
					self::localRmdirRecursive($p);
					$res['writables'][] = $p;
					$res['rmNames'][] = $name;
					continue;
				}
				if ($chkMime && ($mimeByName = elFinderVolumeDriver::mimetypeInternalDetect($name)) && $mimeByName !== 'unknown' && !$this->allowPutMime($mimeByName)) {
					self::localRmdirRecursive($p);
					$res['mimes'][] = $p;
					$res['rmNames'][] = $name;
					continue;
				}
				if ($isDir) {
					$cRes = $this->checkExtractItems($p, $checks);
					foreach($cRes as $k => $v) {
						if (is_array($v)) {
							$res[$k] = array_merge($res[$k], $cRes[$k]);
						} else {
							$res[$k] += $cRes[$k];
						}
					}
				} else {
					$res['totalSize'] += sprintf('%u', filesize($p));
				}
			}
			$res['rmNames'] = array_unique($res['rmNames']);
		} else {
			if ($chkSymlink && is_link($path)) {
				unlink($path);
				$res['symlinks'][] = $path;
				$res['rmNames'][] = basename($path);
			} else if ($chkName && ! $this->nameAccepted($name)) {
				unlink($path);
				$res['names'][] = $path;
				$res['rmNames'][] = $name;
			} else if ($chkWritable && ! $this->attr($path, 'write', null, $isDir)) {
				unlink($path);
				$res['writables'][] = $path;
				$res['rmNames'][] = $name;
			} else if ($chkMime && ($mimeByName = elFinderVolumeDriver::mimetypeInternalDetect($name)) && $mimeByName !== 'unknown' && !$this->allowPutMime($mimeByName)) {
				unlink($path);
				$res['mimes'][] = $path;
				$res['rmNames'][] = $name;
			} else {
				$res['totalSize'] += sprintf('%u', filesize($path));
			}
		}
		
		return $res;
	}

	/**
	 * Return files of target directory that is dotfiles excludes.
	 *
	 * @param  string $dir target directory path
	 * @return array
	 * @throws Exception
	 * @author Naoki Sawada
	 */
	protected static function localScandir($dir) {
		// PHP function scandir() is not work well in specific environment. I dont know why.
		// ref. https://github.com/Studio-42/elFinder/issues/1248
		$files = array();
		if ($dh = opendir($dir)) {
			while (false !== ($file = readdir($dh))) {
				if ($file !== '.' && $file !== '..') {
					$files[] = $file;
				}
			}
			closedir($dh);
		} else {
			throw new Exception('Can not open local directory.');
		}
		return $files;
	}
	
	/**
	 * Remove directory recursive on local file system
	 *
	 * @param string $dir Target dirctory path
	 * @return boolean
	 * @author Naoki Sawada
	 */
	protected static function localRmdirRecursive($dir) {
		if (!is_link($dir) && is_dir($dir)) {
			chmod($dir, 0777);
			if ($handle = opendir($dir)) {
				while (false !== ($file = readdir($handle))) {
					if ($file === '.' || $file === '..') {
						continue;
					}
					elFinder::extendTimeLimit(30);
					$path = $dir . DIRECTORY_SEPARATOR . $file;
					if (!is_link($dir) && is_dir($path)) {
						self::localRmdirRecursive($path);
					} else {
						chmod($path, 0666);
						unlink($path);
					}
				}
				closedir($handle);
			}
			return rmdir($dir);
		} elseif (is_file($dir) || is_link($dir)) {
			chmod($dir, 0666);
			return unlink($dir);
		}
		return false;
	}
	
	/**
	 * Move item recursive on local file system
	 * 
	 * @param string $src
	 * @param string $target
	 * @param string $overWrite
	 * @param string $copyJoin
	 * @return boolean
	 * @author Naoki Sawada
	 */
	protected static function localMoveRecursive($src, $target, $overWrite = true, $copyJoin = true) {
		$res = false;
		if (! file_exists($target)) {
			return rename($src, $target);
		}
		if (! $copyJoin || ! is_dir($target)) {
			if ($overWrite) {
				if (is_dir($target)) {
					$del = self::localRmdirRecursive($target);
				} else {
					$del = unlink($target);
				}
				if ($del) {
					return rename($src, $target);
				}
			}
		} else {
			foreach(self::localScandir($src) as $item) {
				$res |= self::localMoveRecursive($src.DIRECTORY_SEPARATOR.$item, $target.DIRECTORY_SEPARATOR.$item, $overWrite, $copyJoin);
			}
		}
		return (bool)$res;
	}
	
	/**
	 * Create Zip archive using PHP class ZipArchive
	 * 
	 * @param  string        $dir      target dir
	 * @param  array         $files    files names list
	 * @param  string|object $zipPath  Zip archive name
	 * @return bool
	 * @author Naoki Sawada
	 */
	protected static function zipArchiveZip($dir, $files, $zipPath) {
		try {
			if ($start = is_string($zipPath)) {
				$zip = new ZipArchive();
				if ($zip->open($dir . DIRECTORY_SEPARATOR . $zipPath, ZipArchive::CREATE) !== true) {
					$zip = false;
				}
			} else {
				$zip = $zipPath;
			}
			if ($zip) {
				foreach($files as $file) {
					$path = $dir . DIRECTORY_SEPARATOR . $file;
					if (is_dir($path)) {
						$zip->addEmptyDir($file);
						$_files = array();
						if ($handle = opendir($path)) {
							while (false !== ($entry = readdir($handle))) {
								if ($entry !== "." && $entry !== "..") {
									$_files[] = $file . DIRECTORY_SEPARATOR . $entry;
								}
							}
							closedir($handle);
						}
						if ($_files) {
							self::zipArchiveZip($dir, $_files, $zip);
						}
					} else {
						$zip->addFile($path, $file);
					}
				}
				$start && $zip->close();
			}
		} catch (Exception $e) {
			return false;
		}
		return true;
	}
	
	/**
	 * Unpack Zip archive using PHP class ZipArchive
	 * 
	 * @param  string $zipPath  Zip archive name
	 * @param  string $toDir    Extract to path
	 * @return bool
	 * @author Naoki Sawada
	 */
	protected static function zipArchiveUnzip($zipPath, $toDir) {
		try {
			$zip = new ZipArchive();
			if ($zip->open($zipPath) === true) {
				$zip->extractTo($toDir);
				$zip->close();
			}
		} catch (Exception $e) {
			return false;
		}
		return true;
	}
	
	/**
	 * Recursive symlinks search
	 *
	 * @param  string  $path  file/dir path
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	protected static function localFindSymlinks($path) {
		if (is_link($path)) {
			return true;
		}
		
		if (is_dir($path)) {
			foreach (self::localScandir($path) as $name) {
				$p = $path.DIRECTORY_SEPARATOR.$name;
				if (is_link($p)) {
					return true;
				}
				if (is_dir($p) && $this->_findSymlinks($p)) {
					return true;
				}
			}
		}
		
		return false;
	}
	
	/**==================================* abstract methods *====================================**/
	
	/*********************** paths/urls *************************/
	
	/**
	 * Return parent directory path
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _dirname($path);

	/**
	 * Return file name
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _basename($path);

	/**
	 * Join dir name and file name and return full path.
	 * Some drivers (db) use int as path - so we give to concat path to driver itself
	 *
	 * @param  string  $dir   dir path
	 * @param  string  $name  file name
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _joinPath($dir, $name);

	/**
	 * Return normalized path 
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _normpath($path);

	/**
	 * Return file path related to root dir
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _relpath($path);
	
	/**
	 * Convert path related to root dir into real path
	 *
	 * @param  string  $path  rel file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _abspath($path);
	
	/**
	 * Return fake path started from root dir.
	 * Required to show path on client side.
	 *
	 * @param  string  $path  file path
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _path($path);
	
	/**
	 * Return true if $path is children of $parent
	 *
	 * @param  string  $path    path to check
	 * @param  string  $parent  parent path
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _inpath($path, $parent);
	
	/**
	 * Return stat for given path.
	 * Stat contains following fields:
	 * - (int)    size    file size in b. required
	 * - (int)    ts      file modification time in unix time. required
	 * - (string) mime    mimetype. required for folders, others - optionally
	 * - (bool)   read    read permissions. required
	 * - (bool)   write   write permissions. required
	 * - (bool)   locked  is object locked. optionally
	 * - (bool)   hidden  is object hidden. optionally
	 * - (string) alias   for symlinks - link target path relative to root path. optionally
	 * - (string) target  for symlinks - link target path. optionally
	 *
	 * If file does not exists - returns empty array or false.
	 *
	 * @param  string  $path    file path 
	 * @return array|false
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _stat($path);
	

	/***************** file stat ********************/

		
	/**
	 * Return true if path is dir and has at least one childs directory
	 *
	 * @param  string  $path  dir path
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _subdirs($path);
	
	/**
	 * Return object width and height
	 * Ususaly used for images, but can be realize for video etc...
	 *
	 * @param  string  $path  file path
	 * @param  string  $mime  file mime type
	 * @return string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _dimensions($path, $mime);
	
	/******************** file/dir content *********************/

	/**
	 * Return files list in directory
	 *
	 * @param  string  $path  dir path
	 * @return array
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _scandir($path);
	
	/**
	 * Open file and return file pointer
	 *
	 * @param  string $path file path
	 * @param  string $mode open mode
	 * @return resource|false
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _fopen($path, $mode="rb");
	
	/**
	 * Close opened file
	 * 
	 * @param  resource  $fp    file pointer
	 * @param  string    $path  file path
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _fclose($fp, $path='');
	
	/********************  file/dir manipulations *************************/
	
	/**
	 * Create dir and return created dir path or false on failed
	 *
	 * @param  string  $path  parent dir path
	 * @param string  $name  new directory name
	 * @return string|bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _mkdir($path, $name);
	
	/**
	 * Create file and return it's path or false on failed
	 *
	 * @param  string  $path  parent dir path
	 * @param string  $name  new file name
	 * @return string|bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _mkfile($path, $name);
	
	/**
	 * Create symlink
	 *
	 * @param  string  $source     file to link to
	 * @param  string  $targetDir  folder to create link in
	 * @param  string  $name       symlink name
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _symlink($source, $targetDir, $name);

	/**
	 * Copy file into another file (only inside one volume)
	 *
	 * @param  string $source source file path
	 * @param $targetDir
	 * @param  string $name file name
	 * @return bool|string
	 * @internal param string $target target dir path
	 * @author Dmitry (dio) Levashov
	 */
	abstract protected function _copy($source, $targetDir, $name);

	/**
	 * Move file into another parent dir.
	 * Return new file path or false.
	 *
	 * @param  string $source source file path
	 * @param $targetDir
	 * @param  string $name file name
	 * @return bool|string
	 * @internal param string $target target dir path
	 * @author Dmitry (dio) Levashov
	 */
	abstract protected function _move($source, $targetDir, $name);
	
	/**
	 * Remove file
	 *
	 * @param  string  $path  file path
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _unlink($path);

	/**
	 * Remove dir
	 *
	 * @param  string  $path  dir path
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _rmdir($path);

	/**
	 * Create new file and write into it from file pointer.
	 * Return new file path or false on error.
	 *
	 * @param  resource  $fp   file pointer
	 * @param  string    $dir  target dir path
	 * @param  string    $name file name
	 * @param  array     $stat file stat (required by some virtual fs)
	 * @return bool|string
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _save($fp, $dir, $name, $stat);
	
	/**
	 * Get file contents
	 *
	 * @param  string  $path  file path
	 * @return string|false
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _getContents($path);
	
	/**
	 * Write a string to a file
	 *
	 * @param  string  $path     file path
	 * @param  string  $content  new file content
	 * @return bool
	 * @author Dmitry (dio) Levashov
	 **/
	abstract protected function _filePutContents($path, $content);

	/**
	 * Extract files from archive
	 *
	 * @param  string  $path file path
	 * @param  array   $arc  archiver options
	 * @return bool
	 * @author Dmitry (dio) Levashov, 
	 * @author Alexey Sukhotin
	 **/
	abstract protected function _extract($path, $arc);

	/**
	 * Create archive and return its path
	 *
	 * @param  string  $dir    target dir
	 * @param  array   $files  files names list
	 * @param  string  $name   archive name
	 * @param  array   $arc    archiver options
	 * @return string|bool
	 * @author Dmitry (dio) Levashov, 
	 * @author Alexey Sukhotin
	 **/
	abstract protected function _archive($dir, $files, $name, $arc);

	/**
	 * Detect available archivers
	 *
	 * @return void
	 * @author Dmitry (dio) Levashov, 
	 * @author Alexey Sukhotin
	 **/
	abstract protected function _checkArchivers();

	/**
	 * Change file mode (chmod)
	 *
	 * @param  string  $path  file path
	 * @param  string  $mode  octal string such as '0755'
	 * @return bool
	 * @author David Bartle,
	 **/
	abstract protected function _chmod($path, $mode);

	
} // END class
