Aes encryption PHP 7.0 with OpenSSL

aes.php

/**
Aes encryption
*/
class AES {
   
    protected $key;
    protected $data;
    protected $method;
    /**
     * Available OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING
     *
     * @var type $options
     */
    protected $options = 0;
    /**
     * 
     * @param type $data
     * @param type $key
     * @param type $blockSize
     * @param type $mode
     */
    function __construct($data = null, $key = null, $blockSize = null, $mode = 'CBC') {
        $this->setData($data);
        $this->setKey($key);
        $this->setMethode($blockSize, $mode);
    }
    /**
     * 
     * @param type $data
     */
    public function setData($data) {
        $this->data = $data;
    }
    /**
     * 
     * @param type $key
     */
    public function setKey($key) {
        $this->key = $key;
    }
    /**
     * CBC 128 192 256 
      CBC-HMAC-SHA1 128 256
      CBC-HMAC-SHA256 128 256
      CFB 128 192 256
      CFB1 128 192 256
      CFB8 128 192 256
      CTR 128 192 256
      ECB 128 192 256
      OFB 128 192 256
      XTS 128 256
     * @param type $blockSize
     * @param type $mode
     */
    public function setMethode($blockSize, $mode = 'CBC') {
        if($blockSize==192 && in_array('', array('CBC-HMAC-SHA1','CBC-HMAC-SHA256','XTS'))){
            $this->method=null;
             throw new Exception('Invlid block size and mode combination!');
        }
        $this->method = 'AES-' . $blockSize . '-' . $mode;
    }
    /**
     * 
     * @return boolean
     */
    public function validateParams() {
        if ($this->data != null &&
                $this->method != null ) {
            return true;
        } else {
            return FALSE;
        }
    }
//it must be the same when you encrypt and decrypt
     protected function getIV() {
        return '1234567890123456';
         //return mcrypt_create_iv(mcrypt_get_iv_size($this->cipher, $this->mode), MCRYPT_RAND);
         return openssl_random_pseudo_bytes(openssl_cipher_iv_length($this->method));
     }
    /**
     * @return type
     * @throws Exception
     */
    public function encrypt() {
        if ($this->validateParams()) { 
            return trim(openssl_encrypt($this->data, $this->method, $this->key, $this->options,$this->getIV()));
        } else {
            throw new Exception('Invlid params!');
        }
    }
    /**
     * 
     * @return type
     * @throws Exception
     */
    public function decrypt() {
        if ($this->validateParams()) {
           $ret=openssl_decrypt($this->data, $this->method, $this->key, $this->options,$this->getIV());
          
           return   trim($ret); 
        } else {
            throw new Exception('Invlid params!');
        }
    }
}

Encryption & Decryption example

include 'AES.php's;
$inputText = "Message";
$inputKey = "Secret Key";
$blockSize = 256;
$aes = new AES($inputText, $inputKey, $blockSize);
$enc = $aes->encrypt();
$aes->setData($enc);
$dec=$aes->decrypt();
echo "After encryption: ".$enc."<br/>";
echo "After decryption: ".$dec."<br/>";