PHP之微信服務號如何取得openid

本篇文章主要講述了用PHP實作微信服務號取得openid，具有一定參考價值，有興趣的朋友可以了解一下。

public function tetst(){
  if(!isset($_GET['code'])){
          $APPID = $this->app_id;
          $ran = rand(1,100); //预防缓存
          $REDIRECT_URI = 'http://www.onedayoneclass.com/Home/Index/tetst?number='.$ran.''; //一定写上http://
          $scope='snsapi_userinfo';
          $url='https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$APPID.'&redirect_uri='.urlencode($REDIRECT_URI).'&response_type=code&scope='.$scope.'&state=wx'.'#wechat_redirect';
          //加缓存 随机数
          header("Location:".$url);
      }else{
        $appid = $this->app_id;
        $secret = $this->app_secret;
         $code = $_GET["code"];
         $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$secret.'&code='.$code.'&grant_type=authorization_code';
         $ch = curl_init();
         curl_setopt($ch,CURLOPT_URL,$get_token_url);
         curl_setopt($ch,CURLOPT_HEADER,0);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );
         curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
         $res = curl_exec($ch);
         curl_close($ch);
         $json_obj = json_decode($res,true);
         //根据openid和access_token查询用户信息
         $access_token = $json_obj['access_token'];
         $openid = $json_obj['openid'];
         $get_user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';

         $ch = curl_init();
         curl_setopt($ch,CURLOPT_URL,$get_user_info_url);
         curl_setopt($ch,CURLOPT_HEADER,0);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1 );
         curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
         $res = curl_exec($ch);
         curl_close($ch);

         //解析json
         $user_obj = json_decode($res,true);
         $_SESSION['user'] = $user_obj;
         print_r($user_obj);
     }
}

結果：

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