用來取代舊的DES(Data Encryption Standard)
php 的 mcrypt_encrypt 函數在php7.2就不支援要使用openssl_encrypt
使用openssl加解密方法：
function encrypt($key, $payload)
{
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'));
$encrypted = openssl_encrypt($payload, 'aes-256-cbc', $key, 0, $iv);
return base64_encode($encrypted . '::' . $iv);
}
function decrypt($key, $garble)
{
list($encrypted_data, $iv) = explode('::', base64_decode($garble), 2);
return openssl_decrypt($encrypted_data, 'aes-256-cbc', $key, 0, $iv);
}
$key = "ABCDE";
echo $encode = encrypt($key, "123");
echo "<br>";
echo $decode = decrypt($key, $encode);
