public function openOAuth(){        //获取回调连接中带有的code        $code = $_GET[‘code‘];        //获取access_token openid        $json = file_get_contents("https://api.weixin.qq.com/sns/oauth2/access_token?appid=wx7a5423a6f023716c5&secret=6bb7bstddekxrsa3bdcd296979bfb66967f41&code=$code&grant_type=authorization_code");        $json = json_decode($json);        $refresh_token =  $json->refresh_token;
　　　　　　//通过refresh_token 获取需要的access_token        $json_ref = file_get_contents("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=wx3a542a6f094310c5&grant_type=refresh_token&refresh_token=$refresh_token");        $json_ref = json_decode($json_ref);        $access_token = $json_ref->access_token;        $openId = $json_ref->openid;        $json_userinfo = file_get_contents("https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openId&lang=zh_CN");        $json_userinfo = json_decode($json_userinfo);        $nikename = $json_userinfo->nickname;        $sex = $json_userinfo->sex;        $area = $json_userinfo->province.‘-‘.$json_userinfo->city.‘-‘.$json_userinfo->country;        $headimgurl = $json_userinfo->headimgurl;        //echo $headimgurl;        $privilege = $json_userinfo->privilege;        $unionid = $json_userinfo->unionid;        echo "<h1>展示身份信息</h1>";        echo"<h2>昵称：$nikename</h2>";        echo"<h2>性别：$sex</h2>";        echo"<h2>地址：$area</h2>";        echo‘<h2>头像</h2><img src="http://www.mamicode.com/‘.$headimgurl.‘">‘;        echo"<h2>privilege:$privilege </h2>";        echo"<h2>unionid:$unionid</h2>";    }