Rijndael 256-bit Encryption Function (ECB)

mcrypt-ecb.php

<?php
// Define an strong encryption key to use with MCRYPT
// Note: The same encryption key used to encrypt the data must be used to decrypt the data correctly
define('ENCRYPTION_KEY', 'ayf9y0fuY3WN27bha45c65g5pw8FEep7');

// Encrypt Function
function mc_encrypt($encrypt, $mc_key){
    $encrypt = serialize($encrypt);
    $passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($encrypt),
    MCRYPT_MODE_ECB));
    $encoded = base64_encode($passcrypt);
    return $encoded;
}

// Decrypt Function
function mc_decrypt($decrypt, $mc_key){
    $decoded = base64_decode($decrypt);
    $decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($decoded),
    MCRYPT_MODE_ECB));
    $decrypted = unserialize($decrypted);
    return $decrypted;
}

echo '<h1>Rijndael 256-bit Encryption Function</h1>';

$data = 'Super secret confidential string data.';
$encrypted_data = mc_encrypt($data, ENCRYPTION_KEY);
echo '<h2>Example #1: String Data</h2>';
echo 'Data to be Encrypted: ' . $data . '<br/>';
echo 'Encrypted Data: ' . $encrypted_data . '<br/>';
echo 'Decrypted Data: ' . mc_decrypt($encrypted_data, ENCRYPTION_KEY) . '</br>';

$data = array(1, 5, 8, 9, 22, 10, 61);
$encrypted_data = mc_encrypt($data, ENCRYPTION_KEY);
echo '<h2>Example #2: Non-String Data</h2>';
echo 'Data to be Encrypted: <pre>';
print_r($data);
echo '</pre><br/>';
echo 'Encrypted Data: ' . $encrypted_data . '<br/>';
echo 'Decrypted Data: <pre>';
print_r(mc_decrypt($encrypted_data, ENCRYPTION_KEY));
echo '</pre>';
?>