<?php

// Example usage
$plaintext = "My secret message!";
$encryptionKey = "YourSecretKey"; // Replace with your actual key 

$ciphertext = encrypt($plaintext, $encryptionKey);
echo "Ciphertext: $ciphertext\n"; 

$decodedText = decrypt($ciphertext, $encryptionKey);
echo "Decrypted Text: " . $decodedText;

?>