An incorrect passkey will merely decrypt improperly, giving you an incorrect result.
<?php

$input = $_GET['input'];
$passkey = $_GET['passkey'];


function random_crud() {
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
	echo rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999) . rand(1111, 9999); echo "\n";
}

	if($input != "230.98D9.3cn39'3.25;32]3.[2ds") {
		if($passkey == "EmPOWER") {
			header("Location: http://www.emperors.hellninja.com/WEIRD");
		} else {random_crud();}
	} else { echo "INVALID SECURITY KEY. ATTEMPT LOGGED."; } 
 
