微信公众号开发之网页授权（获取用户信息）

<?php
    $appid='wxe5809c42e6c00d2d';
    $redirect_uri = urlencode ( 'http://dingcanphp.applinzi.com/getUserInfo.php' );//将字符串以 URL 编码。
    $url ="https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect";
    header("Location:".$url);//header() 函数向客户端发送原始的 HTTP 报头。
?>

<?php
    header("content-type:text/html;charset=utf-8");
    $code = $_GET["code"];//预定义的 $_GET 变量用于收集来自 method="get" 的表单中的值。
    if (isset($_GET['code'])){//判断code是否存在
        $userinfo = getUserInfo($code);
        $xinxi = $userinfo['nickname'];//获取nickname对应的值,即用户名
        print '<h2 style="text-align:center">用户名：'.$xinxi.'</h2>';//打印输出
    }else{
        echo "NO CODE";
    }
    
    function getUserInfo($code)
    {
        $appid = "wxe5809c42e6c00d2d";
        $appsecret = "506eba1b31666f6052e9c703f906368b";

        //Get access_token
        $access_token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$appsecret&code=$code&grant_type=authorization_code";
        $access_token_json = https_request($access_token_url);//自定义函数
        $access_token_array = json_decode($access_token_json,true);//对 JSON 格式的字符串进行解码，转换为 PHP 变量，自带函数
        //获取access_token
        $access_token = $access_token_array['access_token'];//获取access_token对应的值
        //获取openid
        $openid = $access_token_array['openid'];//获取openid对应的值

        //Get user info
        $userinfo_url = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openid";
        $userinfo_json = https_request($userinfo_url);
        $userinfo_array = json_decode($userinfo_json,ture);
        return $userinfo_array;
    }

    function https_request($url)//自定义函数,访问url返回结果
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl,  CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($curl);
        if (curl_errno($curl)){
            return 'ERROR'.curl_error($curl);
        }
        curl_close($curl);
        return $data;
    }
?>

//自动回复模式
        if (strstr($keyword, "文本")){
            $content = "这是个文本";
        }else if (strstr($keyword, "登录")){
            $content = "OAuth2.0网页授权演示\n";
            $content .= '<a href="http://dingcanphp.applinzi.com/login.php">点击这里体验</a>';
            $content .="\n".'<a href="https://jq.qq.com/?_wv=1027&k=4BeSCye">技术支持 现代软件工程工作室</a>';
        }else{
            $content = date("Y-m-d H:i:s",time())."\n\n".'技术支持 现代软件工程工作室';
        }

{
    "button": [
             {
                    "type":"view",
                    "name":"餐厅信息",
                    "url":"http://dingcanphp.applinzi.com/index/canting.html"
                },
         {
            "name": "帮助",
            "sub_button": [
                {
                         "type":"view",
                         "name":"天气查询",
                         "url":"http://dingcanphp.applinzi.com/index/tianqi.html"
                },
        {
                         "type":"view",
                         "name":"网页授权",
                         "url":"http://dingcanphp.applinzi.com/login.php"
                }
            ]
        }    
    ]
}