最近遇到一個項目是關(guān)于微信公眾號開發(fā)的。
公眾號連接里點(diǎn)菜單，生成一個帶二維碼的專屬海報，分享海報到好友或者朋友圈讓好點(diǎn)點(diǎn)擊，好友關(guān)注后算是助力成功，集夠相應(yīng)好友數(shù)獲得獎勵。
每一次好友助力，分享者都會收到消息，如果助力者之前沒關(guān)注過公眾號提示成功助力一人，關(guān)注過提醒助失敗。
助力者也可以生成專屬海報，形成閉環(huán)。

開發(fā)過程中主要用到對授權(quán)用戶進(jìn)行判斷，用戶是否關(guān)注過公眾號，以及微信公眾號消息接口。
下面記錄下具體實現(xiàn)的代碼。

<?php
/*
 * 模板消息發(fā)送，電腦端測試時需要手動填寫openid 
 * 微信端會自動獲取當(dāng)前openid發(fā)送無需填寫
 */
header("Content-type: text/html; charset=utf-8");
date_default_timezone_set("Asia/Shanghai");

$temp = new template();


//判斷用戶是否關(guān)注公眾號
function issub($openid){

	$access_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=SECRET";
    $access_msg = json_decode(file_get_contents($access_token));
    $token = $access_msg->access_token;
    $subscribe_msg = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=$token&openid=$openid";
    $subscribe = json_decode(file_get_contents($subscribe_msg));
    $gzxx = $subscribe->subscribe;
    //
    if($gzxx === 1){
    	echo "已關(guān)注";
    }else{
    	echo "未關(guān)注請關(guān)注。<img src='/public/images/gzh.png' />";
 	}
	
}
if (strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false) {
    if (!empty($_GET['code'])) {
        $openid = $temp->GetOpenid();        
        issub($openid);
        if ($openid) {
            $result = $temp->sendMsg($openid);
            if ($result['errmsg'] == 'ok') {
                echo '<script>alert("發(fā)送成功!");</script>';
            } else {
                echo '發(fā)送失敗!';
            }
        } else {
            echo '<script>alert("獲取openID失敗!");</script>';
        }
    } else {
        $temp->GET_Code();
    }
} else {
    echo '<script>alert("發(fā)送模板需要先獲取openID!");</script>';
    $openid='orpdAwprTZvFaUwPDfW4WSanlZIk';
    $result = $temp->sendMsg($openid);
    if ($result['errmsg'] == 'ok') {
        echo '<script>alert("發(fā)送成功!");</script>';
    } else {
        echo '發(fā)送失敗!' . $result['errmsg'];
    }
}
 
class template {
 
    public $appid = "APPID";
    public $secret = "SECRET";
 
    public function sendMsg($openid) {
 
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" . $this->appid . "&secret=" . $this->secret;
        //獲取access_token
        $resultData = $this->https_getRequest($url);
        $access_token = $resultData["access_token"];
 
        //$openid = 'orpdAwprTZvFaUwPDfW4WSanlZIk';
        $templateid = '模板ID';
        $title = "標(biāo)題";
        $data1 = "變量一";
        $data2 = "變量二";
        $data3 = "變量三";
        $data4 = date("Y年m月d日 H:i", time());
        $remark = "內(nèi)容說明！";
 
        $url = "https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=" . $access_token;
        /*
         * @miniprogram 跳小程序所需數(shù)據(jù)，不需跳小程序可不用傳該數(shù)據(jù)
         * @appid       appid必須與發(fā)模板消息的公眾號是綁定關(guān)聯(lián)關(guān)系）
         * @pagepath    所需跳轉(zhuǎn)到小程序的具體頁面路徑，支持帶參數(shù),（示例index?foo=bar）
         */
 
        $data = '{
           "touser":"' . $openid . '",
           "template_id":"' . $templateid . '",
           "url":"模板跳轉(zhuǎn)網(wǎng)址", 
           "miniprogram":{
             "appid":"",
             "pagepath":""
           },         
           "data":{
                   "first": {
                       "value":"' . $title . '",
                       "color":"#7A378B"
                   },
                   "keyword1":{
                       "value":"' . $data1 . '",
                       "color":"#787878"
                   },
                   "keyword2": {
                       "value":"' . $data2 . '",
                       "color":"#787878"
                   },
                   "keyword3": {
                       "value":"' . $data3 . '",
                       "color":"#787878"
                   },
                   "keyword4": {
                       "value":"' . $data4 . '",
                       "color":"#787878"
                   },
                   "remark":{
                       "value":"' . $remark . '",
                       "color":"#C5C1AA"
                   }
           }
       }';
        $send = $this->https_request($url, $data);
        $send = json_decode($send, true);
        return $send;
    }
 
    //發(fā)起獲得code值鏈接
    public function GET_Code() {
        $get_url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" . $this->appid;
        $url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
        header("location:" . $get_url . "&redirect_uri=" . $url . "&response_type=code&scope=snsapi_base&state=1#wechat_redirect");
    }
 
    //獲取用戶openid
    public function GetOpenid() {
        $get_token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . $this->appid . '&secret=' . $this->secret . '&code=' . $_GET['code'] . '&grant_type=authorization_code';
        $json_obj = $this->https_getRequest($get_token_url);
        // $access_token = $json_obj['access_token'];
        return $json_obj['openid'];
    }
 
    /*
     * 獲取數(shù)據(jù)
     */
 
    public function https_getRequest($url) {
        $ch = curl_init();
        curl_setopt($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);
        $jsonData = json_decode($output, true);
        return $jsonData;
    }
 
    //通用數(shù)據(jù)處理方法發(fā)送模板消息
    public function https_request($url, $data = null) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)) {
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
 
}
?>

其它配制詳見微信公眾平臺開發(fā)者文檔呢。