Encrypt/Decrypt Simple Class

EncDec.class.php

class EncDec {
    private $securekey, $iv;
    function __construct($key) {
        $this->key = hash('sha256',$key,true);
        $this->iv = mcrypt_create_iv(32);
    }
    function encrypt($input) {
        $encData = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->key , $input, MCRYPT_MODE_ECB, $this->iv);
        return base64_encode($encData);
    }
    function decrypt($input) {
        $decData = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->key, base64_decode($input), MCRYPT_MODE_ECB, $this->iv);
        return trim($decData);
    }
}

$enc_dec = new EncDec("pass");

$encrypted = $enc_dec->encrypt("secret data");

$decrypted = $enc_dec->decrypt($encrypted);