Implementing AES encryption and decryption with PHP

PHP Realization AES Encryption and decryption

class Aes
{
    /**
     * var string $method  Encryption and decryption methods , It can be done by openssl_get_cipher_methods() get 
     */
    protected $method;

    /**
     * var string $secret_key  Encryption and decryption key 
     */
    protected $secret_key;

    /**
     * var string $iv  Decrypted vector , Some methods need to be set, such as CBC
     */
    protected $iv;

    /**
     * var string $options （ I don't know how to explain , Currently set to 0 No problem ）
     */
    protected $options;

    /**
     *  Constructors 
     *
     * @param string $key  secret key 
     * @param string $method  encryption 
     * @param string $iv iv vector 
     * @param mixed $options 
     *
     */
    public function __construct($key, $method = 'AES-128-ECB', $iv = '', $options = 0)
    {
        // key It must be set 
        $this->secret_key = isset($key) ? $key : 'morefun';

        $this->method = $method;

        $this->iv = $iv;

        $this->options = $options;
    }

    /**
     *  Encryption method , Encrypt data , Return encrypted data 
     *
     * @param string $data  Data to encrypt 
     *
     * @return string
     *
     */
    public function encrypt($data)
    {
        return openssl_encrypt($data, $this->method, $this->secret_key, $this->options, $this->iv);
    }

    /**
     *  Decryption method , Decrypt data , Return decrypted data 
     *
     * @param string $data  Data to decrypt 
     *
     * @return string
     *
     */
    public function decrypt($data)
    {
        return openssl_decrypt($data, $this->method, $this->secret_key, $this->options, $this->iv);
    }
}