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<?php
 
// Source: http://stackoverflow.com/a/8232171/195722
function aes_encrypt($key, $text) {
    $realKey = "";
    if (count($key) < 32) { //if it's less than 32 bits - pad it
        $realKey =  str_pad($key, 32 - count($key) + 1);
    } else if (count($key) > 32) {
        throw new \Exception("Key is too long");
    } else {
        $realKey = $key;
    }
 
    return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $realKey, $text, MCRYPT_MODE_ECB));
}
 
function aes_decrypt($key, $cipherText) {
    $realKey = "";
    if (count($key) < 32) { //if it's less than 32 bits - pad it
        $realKey = str_pad($key, 32 - count($key) + 1);
    } else if (count($key) > 32) {
        throw new \Exception("Key is too long");
    } else {
        $realKey = $key;
    }
    return mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $realKey, base64_decode($cipherText), MCRYPT_MODE_ECB);
}

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