加密需要php5版本，php7方法已弃用 

/**************AES加密请求数据*******************/
    /**
     * 加密通过AES加密请求数据/
     *
     * @param array $query
     * @return string
     */
    public function enAES($key, $input)
    {
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
        $iv = $key;
        mcrypt_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);

        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;

    }

    public function pkcs5_pad($text, $blocksize)
    {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

    //解密
    public function decrypt($encryptStr, $key)
    {
        $localIV = $key;
        $encryptKey = $key;

        $encryptStr = base64_decode($encryptStr);

        //Open module
        $module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);

        //print "module = $module <br/>" ;

        mcrypt_generic_init($module, $encryptKey, $localIV);

        $encryptedData = $encryptStr;
        $encryptedData = mdecrypt_generic($module, $encryptedData);

        return $encryptedData;
    }