php獲取微信openid

lily_wang 發(fā)布于2019-07-01 12:17 / 3411人閱讀

摘要：下面是我寫的一個(gè)關(guān)于獲取的類微信授權(quán)相關(guān)接口獲取微信授權(quán)鏈接跳轉(zhuǎn)地址參數(shù)獲取微信觸發(fā)微信返回碼獲取碼，以獲取獲取授權(quán)網(wǎng)頁(yè)授權(quán)通過(guò)獲取到的這個(gè)方法就是獲取的方法。

使用微信接口，無(wú)論是自動(dòng)登錄還是微信支付我們首先需要獲取的就是openid,獲取openid的方式有兩種，一種是在關(guān)注的時(shí)候進(jìn)行獲取，這種訂閱號(hào)就可以獲取的到，第二種是通過(guò)網(wǎng)頁(yè)授權(quán)獲取，這種獲取需要的是認(rèn)證服務(wù)號(hào)。今天我要說(shuō)的是第二種網(wǎng)頁(yè)授權(quán)獲取openid。下面是我寫的一個(gè)關(guān)于獲取openid的類

app_id}&redirect_uri={$redirect_uri}&response_type=code&scope=snsapi_userinfo&state={$state}#wechat_redirect";
    }
     /**
     * 獲取微信openid
     */
    public function getOpenid($turl)
    {
        if (!isset($_GET["code"])){
            //觸發(fā)微信返回code碼
            
             $url=$this->get_authorize_url($turl, $this->state);
            
            Header("Location: $url");
            exit();
        } else {
            //獲取code碼，以獲取openid
            $code = $_GET["code"];
            $access_info = $this->get_access_token($code);
            return $access_info;
        }
        
    }
    /**
     * 獲取授權(quán)token網(wǎng)頁(yè)授權(quán)
     * 
     * @param string $code 通過(guò)get_authorize_url獲取到的code
     */
    public function get_access_token($code = "")
    {
      $appid=$this->app_id;
      $appsecret=$this->app_secret;
      
        $token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$appid."&secret=".$appsecret."&code=".$code."&grant_type=authorization_code";
        //echo $token_url;
        $token_data = $this->http($token_url);
       // var_dump( $token_data);
        if($token_data[0] == 200)
        {
            $ar=json_decode($token_data[1], TRUE);
            return $ar;
        }
        
        return $token_data[1];
    }
    
    
    public function http($url, $method="", $postfields = null, $headers = array(), $debug = false)
    {
        $ci = curl_init();
        /* Curl settings */
        curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ci, CURLOPT_TIMEOUT, 30);
        curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);
 
        switch ($method) {
            case "POST":
                curl_setopt($ci, CURLOPT_POST, true);
                if (!empty($postfields)) {
                    curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields);
                    $this->postdata = $postfields;
                }
                break;
        }
        curl_setopt($ci, CURLOPT_URL, $url);
        curl_setopt($ci, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ci, CURLINFO_HEADER_OUT, true);
 
        $response = curl_exec($ci);
        $http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
 
        if ($debug) {
            echo "=====post data======
";
            var_dump($postfields);
 
            echo "=====info=====" . "
";
            print_r(curl_getinfo($ci));
 
            echo "=====$response=====" . "
";
            print_r($response);
        }
        curl_close($ci);
        return array($http_code, $response);
    }
 
}
?>

getOpenid($turl)這個(gè)方法就是獲取openid的方法。前端調(diào)用代碼如下：

        $openid=isset($_COOKIE["openid"])?$_COOKIE["openid"]:"";
        
            if(empty($openid))
            {
                $wchat=new wchat();
                $t_url="http://".$_SERVER["HTTP_HOST"]."/user.php?act=register";
                
                $info=$wchat->getOpenid($t_url);
                
                if($info){
                     $openid=$info["openid"];
                  setcookie("openid",$openid,time()+86400*30);    
                    
                }
                
            }

以上就是我總結(jié)的獲取openid的方法啦。