微信扫描二维码登录网站代码示例(2)

/**
         * 通过授权码获取对应的二维码图片地址
         * @param string $code
         * @return string image url
         */
        public function get_code_image($code=''){
                if ($code=='') $code = $this->_logincode;
                if (!$code) return false;
                return 'http://login.weixin.qq.com/qrcode/'.$this->_logincode.'?t=webwx';
        }
       
        /**
         * 设置二维码对应的授权码
         * @param string $code
         * @return class $this
         */
        public  function set_login_code($code) {
                $this->_logincode = $code;
                return $this;
        }
       
        /**
         * 二维码登陆验证
         *
         * @return status:
         * >=400: invaild code; 408: not auth and wait, 400,401: not valid or expired
         * 201: just scaned but not confirm
         * 200: confirm then you can get user info
         */
        public function verify_code() {
                if (!$this->_logincode) return false;
                $t = time().strval(mt_rand(100,999));