微信-网页授权获取用户openid

第一步：用户同意授权，获取code

让客户满意是我们工作的目标，不断超越客户的期望值来自于我们对这个行业的热爱。我们立志把好的技术通过有效、简单的方式提供给客户，将通过不懈努力成为客户在信息化领域值得信任、有价值的长期合作伙伴，公司提供的服务项目有：域名申请、网络空间、营销软件、网站建设、合浦网站维护、网站推广。

在确保微信公众账号拥有授权作用域（scope参数）的权限的前提下（服务号获得高级接口后，默认带有scope参数中的snsapi_base和snsapi_userinfo），引导关注者打开如下页面：

https://open.weixin.qq.com/connect/oauth3/authorize?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect

所以

先用调试接口生成自定义菜单，菜单json如下：

{

"button":[

{

"name":"风信科技",

"sub_button":[

{

"type":"click",

"name":"关于风信",

"key":"FS_V1_1001"

{

"type":"click",

"name":"我们的服务",

"key":"FS_V1_1002"

{

"type":"click",

"name":"成功案例",

"key":"FS_V1_1003"

{

"type":"click",

"name":"解决方案",

"key":"FS_V1_1004"

{

"type":"click",

"name":"OA通讯录",

"key":"FS_V1_1005"

}]

{

"name":"风信产品",

"sub_button":[

{

"type":"click",

"name":"平台产品",

"key":"FS_V2_1001"

{

"type":"click",

"name":"领域产品",

"key":"FS_V2_1002"

{

"type":"click",

"name":"行业产品",

"key":"FS_V2_1003"

{

"type":"view",

"name":"微办公",

"url":"https://open.weixin.qq.com/connect/oauth3/authorize?appid=$APPID&redirect_uri=$URL&response_type=code&scope=snsapi_base&state=1#wechat_redirect"

}]

{

"name":"风信娱乐",

"sub_button":[

{

"type":"click",

"name":"抽奖活动",

"key":"FS_V3_1001"

{

"type":"click",

"name":"查询天气",

"key":"FS_V3_1002"

{

"type":"view",

"name":"更多活动",

"url":"http://www.funsing.com/"

}]

}

第二步，获取openId,

public function index() {
        $code = I('get.code');
        $weid = $this->getOpenId($code);
        if ($weid == "") {
            $this->redirect('/Home/Index/login', array(), 0, "waiting...");
        } else {
            $result = json_decode($this->client->IsAccount(array("weId"=>$weid))->IsAccountResult);
            $info = $result->ErrMsg;
            $this->gotoPage($info, $weid);
        }
    }

//通过code取得openid
    public function getOpenId($code) {
        $urlpre = "https://api.weixin.qq.com/sns/oauth3/access_token?appid=".$this->appId."&secret=".$this->appsecret."&grant_type=authorization_code&code=";
        $url = $urlpre.$code;
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        curl_close($ch);
        $jsoninfo = json_decode($output, true);
        //$access_token = $jsoninfo["access_token"];
        $openid = $jsoninfo["openid"];
        return $openid;       
    }

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