<?php$filename = ‘/mnt/hgfs/workspace/weituibao/app/config/../../public/files/36/temp/201410/21/1413873853598.jpg‘;function getRealPath($filename, $split = ‘/‘){    while(true) {        if (FALSE === strpos($filename, $split . ‘.‘)) {            break;        }        $filename = explode($split, $filename);        foreach($filename as $k => $f) {            if (($k && $f == ‘‘) || $f == ‘.‘) {                unset($filename[$k]);
　　　　　　　　　 break;            }            elseif ($f == ‘..‘) {                unset($filename[$k]);                if(isset($filename[$k-1]))                    unset($filename[$k-1]);                break;            }        }        $filename = implode($split, $filename);    }    return $filename;}echo getRealPath($filename);