Extremely simple cryptor

cryptor.php

function secret($string, $action = 'encrypt', $secret = 'random', $host = 'achterstraat.com', $method = 'AES-256-CBC')
{
	switch($action)
	{
		case 'decrypt': {
			return openssl_decrypt(base64_decode($string), $method, hash('sha256', $secret), 0, mb_substr(hash('sha256', $host), 0, 16));
		}
		default: {
			return base64_encode(openssl_encrypt($string, $method, hash('sha256', $secret), 0, mb_substr(hash('sha256', $host), 0, 16)));
		}
	}
}