1. access_token

1) Two kinds of access_token, web page authorization access_token and ordinary access_token

1. WeChat web page authorization is implemented through the OAuth2.0 mechanism. When the user authorizes the official account Finally, the official account can obtain a web page authorization-specific interface call credential (web page authorization access_token). Through the web page authorization access_token, it can perform post-authorization interface calls, such as obtaining basic user information.

2. For other WeChat interfaces, you need to obtain the ordinary access_token call through the "Get access_token" interface in basic support. The access_token is the globally unique ticket for the official account. The validity period of the access_token is currently 2 hours and needs to be refreshed regularly. Repeated acquisition will cause the last access_token to become invalid.

2) Obtain access_token respectively

1, web page authorization: Click to view the web page authorization to obtain the user's basic information document. By viewing this document,

You can see that the code is exchanged for the web page authorization access_token, and this code is obtained through an authorization link on WeChat, and then obtained according to the request in the document. For the specific link address and parameters, please refer to the document.

/**
?????*?創(chuàng)建一個需要通過微信的OAuth2.0認證的服務url
?????*?@param?$url?服務號需要認證訪問的url
?????*?@param?$scope?string?snsapi_userinfo?|?snsapi_base
?????*??????snsapi_userinfo?可以用來獲取用戶信息
?????*??????snsapi_base?可以用來獲取openid
?????*?@param?string?$state?自定義狀態(tài)值
?????*??????此處約定為from_weixin代表是從微信認證過來，一般無需輕易變化
?????*?@return?string?返回認證url地址
?????*/
????public?function?createAuthUrl($url,?$scope?=?'snsapi_base',?$state?=?'from_weixin')
????{
????????$url?=?strval($url);
????????$authUrl?=?'https://open.weixin.qq.com/connect/oauth2/authorize';
????????/**
?????????*?此處有大坑，請不要打亂param的順序
?????????*?否則微信認證界面會出現(xiàn)白屏
?????????*/
????????$param?=?array(
????????????????'appid'?=>?$this->appId,
????????????????'redirect_uri'?=>?urlencode($url),
????????????????'response_type'?=>?'code',
????????????????'scope'?=>?$scope,
????????????????'state'?=>?$state
????????);
????
????????$seg?=?array();
????????foreach?($param?as?$k?=>?$v)?{
????????????$seg[]?=?"{$k}={$v}";
????????}
????????return?$authUrl?.?'?'?.?join('&',?$seg)?.?'#wechat_redirect';
????}

2. Ordinary: Click to view the access token document, which is obtained through three parameters.

It should be noted here that the token obtained is time-sensitive, 2 hours, so I will save it in MongoDB and first compare it with the database to see if it has timed out. , if not, get it directly from the database to reduce unnecessary requests.

2. Push logs

During the interaction with WeChat, a lot of log information will be generated, and it is often necessary to analyze these logs during development , here I save the logs in MongoDB. The convenience of MongoDB is that data of any structure can be placed in a document. Unlike MySQL, which requires well-defined field names, I often put various structures in a document when debugging.

In the entrance page of WeChat, which is the URL (server address) mentioned above, the logic of saving logs will be done here. The logic includes pushing a message when following, scanning the QR code to follow, clicking on a menu to generate an event, clicking on the hyperlink of the menu, etc.

The log structure is as follows:

1. The code includes signature verification logic

2. Through file_get_contents('php: //input') to obtain the request data, which is the getRawMsg method below

3. Insert the push log directly into MongoDB

4. The received request information SimpleXMLElement object is The following parseMsg method

5 and handleEventMsg handle various situations

/**
?????*?微信公眾號入口
?????*/
????public?function?actionPortal()
????{
????????$weixin?=?new?Weixin();
????????//簽名驗證邏輯
//?????????if($weixin->checkSignature()){
//?????????????echo?$_GET['echostr'];
//?????????}
//?????????exit;
????????//讀取原始請求數(shù)據(jù)
????????$msg?=?$weixin->getRawMsg();
????????
????????//推送日志
????????$pushlog?=?new?WeixinPushLog();
????????$pushlog->logWeixinPush($msg);
????????
????????$msgObj?=?$weixin->parseMsg($msg);
????????if?($msgObj?===?false?||?!is_object($msgObj))?{
????????????exit;
????????}
????????switch?($msgObj->MsgType)?{
????????????case?'event'?:?//接收事件消息
????????????????$this->handleEventMsg($msgObj);
????????????????break;
????????????default?:
????????????????//todo
????????????????break;
????????}
????}

public?function?getRawMsg()
????{
????????return?file_get_contents('php://input');
????}

????/**
?????*?解析接收到的消息
?????*?@param?string?$msg?消息體
?????*?@return?bool|SimpleXMLElement
?????*/
????public?function?parseMsg($msg?=?'')
????{
????????if?(!$msg?||?empty($msg))?{
????????????return?false;
????????}
????????$msgObj?=?simplexml_load_string($msg,?'SimpleXMLElement',?LIBXML_NOCDATA);
????????if?($msgObj?===?false?||?!($msgObj?instanceof?\SimpleXMLElement))?{
????????????return?false;
????????}
????????return?$msgObj;
????}

6. If you want to push messages, the die method must be added

7. The following code only lists two event situations, one is subscription and the other is Click event

8, createRawTuWenMsg is splicing XML, click to view the template message interface.

private?function?handleEventMsg($msgObj)
????{
????????$weixin?=?new?Weixin();
????????$openId?=?$msgObj->FromUserName;
????????$fromUserName?=?$msgObj->ToUserName;
????????//未關注，關注后推送
????????if?($msgObj->Event?==?'subscribe')?{
????????????$pushData['PicUrl']?=?'http://mmbiz.qpic.cn/';
????????????$pushData['Title']?=?'基因檢測，帶你一起探索生命的奧妙?';
????????????$pushData['Description']?=?'為什么不同人在身高、體重、膚色和形狀上長得不一樣？但是往往又和自己的父母相似？';
????????????$pushData['Url']?=?'http://mp.weixin.qq.com';
????????????$msg?=?$weixin->createRawTuWenMsg($fromUserName,?$openId,?array($pushData));

????????????die($msg);
????????}elseif($msgObj->Event?==?'CLICK'){
????????????//die($msg);
????????}
????}

public?function?createRawTuWenMsg($fromUserName,?$toUserName,?$items?=?array())
????{
????????if?(!is_array($items))?{
????????????return?'';
????????}
????????$count?=?count($items);
????????$its?=?'';
????????foreach?($items?as?$item)?{
????????????$its?.=?<<<ITEMTPL
<item>
<Title><![CDATA[{$item[&#39;Title&#39;]}]]></Title>
<Description><![CDATA[{$item[&#39;Description&#39;]}]]></Description>
<PicUrl><![CDATA[{$item[&#39;PicUrl&#39;]}]]></PicUrl>
<Url><![CDATA[{$item[&#39;Url&#39;]}]]></Url>
</item>
ITEMTPL;
????????}
????
????????$msg?=?<<<MSG
<xml>
<ToUserName><![CDATA[{$toUserName}]]></ToUserName>
<FromUserName><![CDATA[{$fromUserName}]]></FromUserName>
<CreateTime>12345678</CreateTime>
<MsgType><![CDATA[news]]></MsgType>
<ArticleCount>{$count}</ArticleCount>
<Articles>
{$its}
</Articles>
</xml>
MSG;
????return?$msg;
????}

demo download:

github address: https://github.com/pwstrick/weixin_demo

CSDN address: http://download.csdn.net/detail/loneleaf1/9045731

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