1.推薦者生成帶引數二維碼，這裡我已經寫過，就不再寫了；寫下獲取access_token

 function __construct()
    {
        $this->appid = config('WXAPP_APPID');
        $this->secrect = config('WXAPP_APPSECRET');
        $this->accessToken = $this->getToken($this->appid,  $this->secrect);
    }
 /**
     * @param $appid
     * @param
 
 $appsecret
     * @return mixed
     * 獲取token
     */
    protected function getToken($appid, $appsecret)
    {
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" . $appid . "&secret=" . $appsecret;
            $token = $this->request_get($url);
            $token
 
 = json_decode(stripslashes($token));
            $arr = json_decode(json_encode($token), true);
            $access_token = $arr['access_token'];

        return $access_token;
    }

2.使用者掃碼事件處理

//獲取使用者關注事件
    public function urlRedirect(){//公眾號配置路徑必須是這裡，接收關注後微信傳過來的引數
        if(!isset($_GET['echostr'
 
])){
            $this->responseMsg();
        }else{
            $this->valid();
        }

    }

    public function valid(){
        $nonce     = $_GET['nonce'];
        $token     = 'FCdVj77fdzdQ771CW6cUvIMipduZ66qw';
        $timestamp = $_GET['timestamp'];
        $echostr   = $_GET['echostr'];
        $signature = $_GET['signature'];
        //形成陣列，然後按字典序排序
        $array = array();
        $array = array($nonce, $timestamp, $token);
        sort($array);
        //拼接成字串,sha1加密 ，然後與signature進行校驗
        $str = sha1( implode( $array ) );
        if( $str  == $signature ){
            //第一次接入weixin api介面的時候
            echo $echostr;
            exit;
        }
    }

    public function responseMsg()
    {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if (!empty($postStr)){
            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
            $RX_TYPE = trim($postObj->MsgType);
            switch($RX_TYPE){
                case "text":
                    $resultStr = $this->handleText($postObj);
                    break;
                case "event":
                    $resultStr = $this->handleEvent($postObj);
                    break;
                default:
                    $resultStr = "Unknow msg type: ".$RX_TYPE;
                    break;
            }
            echo $resultStr;
        }else {
            echo "";
            exit;
        }
    }

    public function handleText($postObj)
    {
        $fromUsername = $postObj->FromUserName;
        $toUsername = $postObj->ToUserName;
        $keyword = trim($postObj->Content);
        $time = time();
        $textTpl = "<xml>
                    <ToUserName><![CDATA[%s]]></ToUserName>
                    <FromUserName><![CDATA[%s]]></FromUserName>
                    <CreateTime>%s</CreateTime>
                    <MsgType><![CDATA[%s]]></MsgType>
                    <Content><![CDATA[%s]]></Content>
                    <FuncFlag>0</FuncFlag>
                    </xml>";
        if(!empty( $keyword ))
        {
            $msgType = "text";
            $contentStr = "歡迎您關注好運平臺！";
            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
            echo $resultStr;
        }else{
            echo "請輸入...";
        }
    }

    public function handleEvent($object)
    {
        $contentStr = "";
        switch ($object->Event)
        {
            case "subscribe":
                $contentStr = "感謝您關注【好運平臺】";
//                $contentStr = "感謝您關注【好運平臺】"."\n".$object->ToUserName."\n".$object->FromUserName."\n".$object->FromUserName."\n".$object->MsgType."\n".$object->Event."\n".$object->EventKey."\n".$object->Ticket;
                $openid = (string)$object->FromUserName; //資料型別轉換為字串,mmp這個問題找了好久
                $refer_id = explode('_',$object->EventKey); //$object->EventKey返回的是qrsence_123這種型別
                 $this->createuserinfo($openid,$refer_id[1]);//獲取使用者資訊
                break;
            case "SCAN":
                $contentStr = "您已關注過，謝謝！";
                break;
        }
        $resultStr = $this->responseText($object, $contentStr);
        return $resultStr;
    }

    public function responseText($object, $content, $flag=0)
    {
        $textTpl = "<xml>
                    <ToUserName><![CDATA[%s]]></ToUserName>
                    <FromUserName><![CDATA[%s]]></FromUserName>
                    <CreateTime>%s</CreateTime>
                    <MsgType><![CDATA[text]]></MsgType>
                    <Content><![CDATA[%s]]></Content>
                    <FuncFlag>%d</FuncFlag>
                    </xml>";
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
        return $resultStr;
    }

3.獲取使用者資訊，繫結關係併入庫

//使用者關注後獲取使用者資訊
    public function createuserinfo($openid,$refer_id)
    {
        $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=" . $this->accessToken . "&openid=" . $openid;
        $user= $this->request_get($url);
        $user = json_decode($user,true);
        $users = array(
            'openid' =>$openid,
            'nickname' =>$user['nickname'],
            'avatar' =>$user['headimgurl'],
            'sex' =>$user['sex'],
            'unionid' =>$user['unionid'],
            'status' => 1,
            'reg_time' =>$user['subscribe_time'],//關注公眾號的時間
            'bind_user'=>$refer_id
        );
        db('user')->insert($users);
    }

4.部分基礎函式的呼叫

 /**
     * 傳送post請求
     * @param string $url
     * @param string $param
     * @return bool|mixed
     */
    function request_post($url = '', $param = '')
    {
        if (empty($url) || empty($param)) {
            return false;
        }
        $postUrl = $url;
        $curlPost = $param;
        $ch = curl_init(); //初始化curl
        curl_setopt($ch, CURLOPT_URL, $postUrl); //抓取指定網頁
        curl_setopt($ch, CURLOPT_HEADER, 0); //設定header
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //要求結果為字串且輸出到螢幕上
        curl_setopt($ch, CURLOPT_POST, 1); //post提交方式
        curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
        $data = curl_exec($ch); //執行curl
        curl_close($ch);
        return $data;
    }
    /**
     * 傳送get請求
     * @param string $url
     * @return bool|mixed
     */
    function request_get($url = '')
    {
        if (empty($url)) {
            return false;
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }