Detailed explanation of php WeChat public platform interaction and interface

This article mainly introduces the development, interaction and interface of PHP WeChat public platform in detail. It has certain reference value. Interested friends can refer to it.

This article is divided into three parts: Everyone will introduce it. The specific content is as follows

1. Interaction between WeChat users, WeChat servers and backend servers

Example: WeChat users send a text message to the public account. This A message will first be sent to the WeChat server. The WeChat server processes the information and passes it to the backend server in XML data format. After receiving the data, the backend server will process the data, and then the response data will be passed to the WeChat server in XML data format. , the WeChat server then responds to the user WeChat interface.
The interaction process between WeChat users and the WeChat backend server is the data transfer process, but it only needs to go through the WeChat server as a transfer station.

So what is the use of the WeChat server as a transfer station?
The xml data is processed and packaged and displayed on the mobile phone screen. The graphic messages we accept are as follows:

Single graphic message:

Multiple graphic messages

You will find that almost all pictures and texts on WeChat are in this format, with the same format and size. This is the result after being packaged by the WeChat server.

2. Interactive data types

Data types that WeChat users can send
1. Text type (text)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
</xml>";

2. Voice (voice)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[voice]]></MsgType>
<Format><![CDATA[amr]]></Format>
<MsgId>5836982871638042400</MsgId>
<MediaId><![CDATA[PGKsO3LAgbVTsFYO7FGu51KUYa07D0C_Nozz2fn1z6VYtHOsF59PTFl0vagGxkVH]]></MediaId>
<Recognition><![CDATA[]]></Recognition>//recognition表示语音识别的结果
</xml>

3. Picture (img)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[image]]></MsgType>
<PicUrl><![CDATA[http://mmbiz.qpic.cn/mmbiz/L4qjYtOibummHn90t1mnaibYiaR8ljyicF3MW7XX3BLp1qZgUb7CtZ0D]]></PicUrl>
<MsgId>5836982871638042400</MsgId>
<MediaId><![CDATA[PGKsO3LAgbVTsFYO7FGu51KUYa07D0C_Nozz2fn1z6VYtHOsF59PTFl0vagGxkVH]]></MediaId>
</xml>

Every message sent to the WeChat server will be marked with a MsgId, and uploaded pictures, videos, voices, etc. will also be marked with a mediaId .

4. Video

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[vedio]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<MediaId><![CDATA[PGKsO3LAgbVTsFYO7FGu51KUYa07D0C_Nozz2fn1z6VYtHOsF59PTFl0vagGxkVH]]></MediaId>
<ThumbMediaId><![CDATA[mxUJ5gcCeesJwx2T9qsk62YzI
clCP_HnRdfTQcojlPeT2G9Q3d22UkSLyBFLZ01J]]></ThumbMediald>;//视频静止时显示那张图片地址
</xml>

5. Location message (location)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[location]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<Location_X>22.539968</Location_X>
<Location_Y>113.954980</Location_Y>
<Scale>16</Scale>
<Label><![CDATA[中国广东省深圳市南山区深南大道9001号 
邮政编码: 518053]]></Label>
</xml>

6. Link message (link)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[link]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<Title><![CDATA[微信公众平台开发者的江湖]]></Title>
<Description><![CDATA[陈坤的微信公众号这段时间大火，大家...]]></Description>
<Url><![CDATA[http://www.cnblogs.com/txw1958/]]></Url>
<MsgId>5839907284805129867</MsgId>
</xml>

Backend server response Message type
1, text type (text)
2, voice (voice)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[voice]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<Voice>
<MediaId><![CDATA[PGKsO3LAgbVTsFYO7FGu51KUYa07D0C_Nozz2fn1z6VYtHOsF59PTFl0vagGxkVH]]></MediaId>
</Voice>
</xml>

3, picture (img)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[image]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<Image>
<MediaId><![CDATA[PGKsO3LAgbVTsFYO7FGu51KUYa07D0C_Nozz2fn1z6VYtHOsF59PTFl0vagGxkVH]]></MediaId>
</Image>
</xml>

4. Video

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[vedio]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<video>
<MediaId><![CDATA[PGKsO3LAgbVTsFYO7FGu51KUYa07D0C_Nozz2fn1z6VYtHOsF59PTFl0vagGxkVH]]></MediaId>
<ThumbMediaId><![CDATA[mxUJ5gcCeesJwx2T9qsk62YzI
clCP_HnRdfTQcojlPeT2G9Q3d22UkSLyBFLZ01J]]></ThumbMediald>;//视频静止时显示那张图片地址
</video>
</xml>

5 , music (music)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[voice]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<Music>
<Title><![CDATA[最炫民族风]]></Title>
<Description><![CDATA[凤凰传奇]]></Description>
<MusicUrl><![CDATA[http://zj189.cn/zj/download/music/zxmzf.mp3]]></MusicUrl>
<HQMusicUrl><![CDATA[http://zj189.cn/zj/dodownload/music/zxmzf.mp3]]></HQMusicUrl>
</Music>
</xml>

6, graphics (news)

<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[news]]></MsgType>
<MsgId>5836982871638042400</MsgId>
<Content><![CDATA[]]></Content>
<ArticleCount>%s</ArticleCount>
<Articles>
<item>
<Title><![CDATA[ 【深圳】实况 温度：6℃ 湿度：62﹪ 风速：东北风2级]]></Title>
<Description><![CDATA[]]></Description>
<PicUrl><![CDATA[http://www.doucube.com/weixin/weather/icon/banner.jpg]]></PicUrl>
<Url><![CDATA[]]></Url>
</item>
<item>
<Title><![CDATA[ 【深圳】实况 温度：6℃ 湿度：62﹪ 风速：东北风2级]]></Title>
<Description><![CDATA[]]></Description>
<PicUrl><![CDATA[http://www.doucube.com/weixin/weather/icon/banner.jpg]]></PicUrl>
<Url><![CDATA[]]></Url>
</item>
</Articles>
</xml>

The above code is only for reference in data filling. The above code can be called when needed. Here we just show you the following data format.
CDATA is a tag, and the text data marked by it will not be parsed by the xml parser. A CDATA component starts with "

ToUserName Receiver Account
FromUserName Sender Account
CreateTime Send Event
MsgType Data Type
Content Text Content
ArticleCount Number of Images and Texts
MsgId Data id
MediaId Media id
Title Title
Description Description
MusicUrl Music connection address
HQMusicUrl High-quality music connection address

2. Specific interaction steps That is, the code

In Figure 2 of the previous chapter, we defined the url and token for the test account. The url is the backend server address for communicating with the WeChat server, and a token is equivalent to a token. The token will be presented when the WeChat server communicates with the backend server. If the backend server finds that the WeChat server is the same as the token it carries, it will communicate. If it is not the same, it will refuse the communication. This process is called token verification (this token is not a token) value).
The above is more vivid, I will explain it through the code below
For example: the url is http://weixinceshi111111.applinzi.com/index2.php
token: weixin
index2.php code

responseMsg();//响应数据
}else{
 $wechatObj->valid();//响应
}

class wechatCallbackapiTest
{
 public function valid()
 {
 $echoStr = $_GET["echostr"];
 if($this->checkSignature()){
 echo $echoStr;
 exit;
 }
 }

 private function checkSignature()
 {
 $signature = $_GET["signature"];
 $timestamp = $_GET["timestamp"];
 $nonce = $_GET["nonce"];
 $token = TOKEN;
 $tmpArr = array($token, $timestamp, $nonce);
 sort($tmpArr);//对数组中的元素进行排序
 $tmpStr = implode($tmpArr);//将数组中的元素连接成一个字符串
 $tmpStr = sha1($tmpStr);//对字符串进行加密操作。

 if($tmpStr == $signature){
 return true;
 }else{
 return false;
 }
 }

 public function responseMsg()
 {
 $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];//获取发送过来的数据。
 if (!empty($postStr)){
 $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', );//把xml字符串载入到一个SimpleXMLelement对象中。simplexml_load_string()是一种xml解析器。
 $RX_TYPE = trim($postObj->MsgType);//trim去掉字符串两端kongge。

 //用户发送的消息类型判断
 switch ($RX_TYPE)
 {
 case "text":
  $result = $this->receiveText($postObj);
  break;
 case "image":
  $result = $this->receiveImage($postObj);
  break;
 case "voice":
  $result = $this->receiveVoice($postObj);
  break;
 case "video":
  $result = $this->receiveVideo($postObj);
  break;
 default:
  $result = "unknow msg type: ".$RX_TYPE;
  break;
 }
 echo $result;
 }else {
 echo "";
 exit;
 }
 }

 private function receiveText($object)
 {
 $keyword = trim($object->Content);

 if($keyword == "文本"){
 //回复文本消息
 $content = "这是个文本消息";
 $result = $this->transmitText($object, $content);
 }
 else if($keyword == "图文" || $keyword == "单图文"){
 //回复单图文消息
 $content = array();
 $content[] = array("Title"=>"单图文标题", 
  "Description"=>"单图文内容", 
  "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", 
  "Url" =>"http://m.cnblogs.com/?u=txw1958");
 $result = $this->transmitNews($object, $content);
 }
 else if($keyword == "多图文"){
 //回复多图文消息
 $content = array();
 $content[] = array("Title"=>"多图文1标题", "Description"=>"", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
 $content[] = array("Title"=>"多图文2标题", "Description"=>"", "PicUrl"=>"http://d.hiphotos.bdimg.com/wisegame/pic/item/f3529822720e0cf3ac9f1ada0846f21fbe09aaa3.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
 $content[] = array("Title"=>"多图文3标题", "Description"=>"", "PicUrl"=>"http://g.hiphotos.bdimg.com/wisegame/pic/item/18cb0a46f21fbe090d338acc6a600c338644adfd.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
 $result = $this->transmitNews($object, $content);

 }
 else if($keyword == "音乐"){
 //回复音乐消息
 $content = array("Title"=>"最炫民族风", 
 "Description"=>"歌手：凤凰传奇", 
 "MusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3",
 "HQMusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3");
 $result = $this->transmitMusic($object, $content);
 }

 return $result;
 }

 private function receiveImage($object)
 {
 //回复图片消息 
 $content = array("MediaId"=>$object->MediaId);
 $result = $this->transmitImage($object, $content);;
 return $result;
 }

 private function receiveVoice($object)
 {
 //回复语音消息 
 $content = array("MediaId"=>$object->MediaId);
 $result = $this->transmitVoice($object, $content);;
 return $result;
 }

 private function receiveVideo($object)
 {
 //回复视频消息 
 $content = array("MediaId"=>$object->MediaId, "ThumbMediaId"=>$object->ThumbMediaId, "Title"=>"", "Description"=>"");
 $result = $this->transmitVideo($object, $content);;
 return $result;
 } 

 /*
 * 回复文本消息，将要回复的xml消息进行包装。
 */
 private function transmitText($object, $content)
 {
 $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
</xml>";
 $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);//sprintf（）这个函数的作用还是比较有意思的，可以搜索看看。
 return $result;
 }

 /*
 * 回复图片消息
 */
 private function transmitImage($object, $imageArray)
 {
 $itemTpl = "
 
";

 $item_str = sprintf($itemTpl, $imageArray['MediaId']);

 $textTpl = "


%s

$item_str
";

 $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
 return $result;
 }

 /*
 * 回复语音消息
 */
 private function transmitVoice($object, $voiceArray)
 {
 $itemTpl = "
 
";

 $item_str = sprintf($itemTpl, $voiceArray['MediaId']);

 $textTpl = "


%s

$item_str
";

 $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
 return $result;
 }

 /*
 * 回复视频消息
 */
 private function transmitVideo($object, $videoArray)
 {
 $itemTpl = "";

 $item_str = sprintf($itemTpl, $videoArray['MediaId'], $videoArray['ThumbMediaId'], $videoArray['Title'], $videoArray['Description']);

 $textTpl = "


%s

$item_str
";

 $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
 return $result;
 }

 /*
 * 回复图文消息
 */
 private function transmitNews($object, $arr_item)
 {
 if(!is_array($arr_item))
 return;

 $itemTpl = " 
 
 
 
 
 
";
 $item_str = "";
 foreach ($arr_item as $item)
 $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']);

 $newsTpl = "


%s


%s

$item_str
";

 $result = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item));
 return $result;
 }

 /*
 * 回复音乐消息
 */
 private function transmitMusic($object, $musicArray)
 {
 $itemTpl = "
 
 
 
 
";

 $item_str = sprintf($itemTpl, $musicArray['Title'], $musicArray['Description'], $musicArray['MusicUrl'], $musicArray['HQMusicUrl']);

 $textTpl = "


%s

$item_str
";

 $result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
 return $result;
 }
}
?>

3. Interface

3.1 What is the interface

The interface is equivalent to a tool with specific functions. For example, when you need to drill holes in the wall when building a house, you will use a drill tool to drill. From the time you bring the tool to the completion of the drilling, you You need to complete a series of steps such as plugging in, calibrating, drilling, etc., and finally achieve your goal. The drill is our interface, and plugging in, calibrating, and drilling are the steps we use to call the tools to complete the purpose.

An example of WeChat's creation menu interface.

Steps to call the interface:
1. Obtain the connection address of the WeChat menu interface and establish a dialogue with this interface through the curl function.
2. Create Menu data is sent to this interface.
After the interface call is completed, this interface will automatically process the data and generate a menu on the WeChat public good page.

Please see the next chapter for how to call the WeChat interface: WeChat public platform development (3): Calling the WeChat advanced interface.

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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