class Crypt {
   static private $default_method = "aes-256-cbc";

   public static function doEncrypt($text_to_encrypt) {
      // ...some preparation stuff here
      $result = base64_encode(openssl_encrypt($text_to_encrypt, self::$default_method, $seckey, OPENSSL_RAW_DATA, $iv));
      return $result;
    }

   public static function doDecrypt($encrypted_text) {
      // ...some preparation stuff here
      $result = openssl_decrypt(base64_decode($encrypted_text), self::$default_method, $seckey, OPENSSL_RAW_DATA, $iv);

      return $result;
   }
}