微信公众号开发之文本消息自动回复

1.PHP示例代码下载

下载地址1：http://pan.baidu.com/s/1nvlhbnV、

下载地址2：https://mp.weixin.qq.com/wiki/home/index.html（开始开发-》接入指南-》PHP示例代码下载）

2.wx_sample.php初始代码

 1 php
 2 /**
 3   * wechat php test
 4   */
 5 
 6 //define your token
 7 define("TOKEN", "weixin");
 8 $wechatObj = new wechatCallbackapiTest();
 9 $wechatObj->valid();
10 
11 class wechatCallbackapiTest
12 {
13     public function valid()
14     {
15         $echoStr = $_GET["echostr"];
16 
17         //valid signature , option
18         if($this->checkSignature()){
19             echo $echoStr;
20             exit;
21         }
22     }
23 
24     public function responseMsg()
25     {
26         //get post data, May be due to the different environments
27         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
28 
29           //extract post data
30         if (!empty($postStr)){
31                 /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
32                    the best way is to check the validity of xml by yourself */
33                 libxml_disable_entity_loader(true);
34                   $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
35                 $fromUsername = $postObj->FromUserName;
36                 $toUsername = $postObj->ToUserName;
37                 $keyword = trim($postObj->Content);
38                 $time = time();
39                 $textTpl = "40                             41                             42                             %s43                             44                             45                             046                             ";             
47                 if(!empty( $keyword ))
48                 {
49                       $msgType = "text";
50                     $contentStr = "Welcome to wechat world!";
51                     $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
52                     echo $resultStr;
53                 }else{
54                     echo "Input something...";
55                 }
56 
57         }else {
58             echo "";
59             exit;
60         }
61     }
62         
63     private function checkSignature()
64     {
65         // you must define TOKEN by yourself
66         if (!defined("TOKEN")) {
67             throw new Exception('TOKEN is not defined!');
68         }
69         
70         $signature = $_GET["signature"];
71         $timestamp = $_GET["timestamp"];
72         $nonce = $_GET["nonce"];
73                 
74         $token = TOKEN;
75         $tmpArr = array($token, $timestamp, $nonce);
76         // use SORT_STRING rule
77         sort($tmpArr, SORT_STRING);
78         $tmpStr = implode( $tmpArr );
79         $tmpStr = sha1( $tmpStr );
80         
81         if( $tmpStr == $signature ){
82             return true;
83         }else{
84             return false;
85         }
86     }
87 }
88 
89 ?>

wx_sample.php

3.调用回复信息方法

在wx_sample.php文件中注释掉$wechatObj->valid();，在其下增加一句“$wechatObj->responseMsg();”。

 1 php
 2 /**
 3   * wechat php test
 4   */
 5 
 6 //define your token
 7 define("TOKEN", "weixin");
 8 $wechatObj = new wechatCallbackapiTest();
 9 //$wechatObj->valid();//接口验证
10 $wechatObj->responseMsg();//调用回复消息方法
11 class wechatCallbackapiTest
12 {
13     public function valid()
14     {
15         $echoStr = $_GET["echostr"];
16 
17         //valid signature , option
18         if($this->checkSignature()){
19             echo $echoStr;
20             exit;
21         }
22     }
23 
24     public function responseMsg()
25     {
26         //get post data, May be due to the different environments
27         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
28 
29           //extract post data
30         if (!empty($postStr)){
31                 /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
32                    the best way is to check the validity of xml by yourself */
33                 libxml_disable_entity_loader(true);
34                   $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
35                 $fromUsername = $postObj->FromUserName;
36                 $toUsername = $postObj->ToUserName;
37                 $keyword = trim($postObj->Content);
38                 $time = time();
39                 $textTpl = "40                             41                             42                             %s43                             44                             45                             046                             ";             
47                 if(!empty( $keyword ))
48                 {
49                       $msgType = "text";
50                     $contentStr = "Welcome to wechat world!";
51                     $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
52                     echo $resultStr;
53                 }else{
54                     echo "Input something...";
55                 }
56 
57         }else {
58             echo "";
59             exit;
60         }
61     }
62         
63     private function checkSignature()
64     {
65         // you must define TOKEN by yourself
66         if (!defined("TOKEN")) {
67             throw new Exception('TOKEN is not defined!');
68         }
69         
70         $signature = $_GET["signature"];
71         $timestamp = $_GET["timestamp"];
72         $nonce = $_GET["nonce"];
73                 
74         $token = TOKEN;
75         $tmpArr = array($token, $timestamp, $nonce);
76         // use SORT_STRING rule
77         sort($tmpArr, SORT_STRING);
78         $tmpStr = implode( $tmpArr );
79         $tmpStr = sha1( $tmpStr );
80         
81         if( $tmpStr == $signature ){
82             return true;
83         }else{
84             return false;
85         }
86     }
87 }
88 
89 ?>

调用回复信息方法

4.关键词自动回复和关注回复

$keyword保存着用户微信端发来的文本信息。

官方开发者文档：https://mp.weixin.qq.com/wiki/home/index.html（消息管理-》接收消息-接收事件推送-》1.关注/取消关注事件）

关注事件与一般的文本消息有两处不同，一是MsgType值是event，二是增加了Event值是subscribe。由于官方文档（最初的wx_sample.php）没有提取这个参数，需要我们自己提取。在程序中增加两个变量$msgType和$event。

  1 php
  2 /**
  3   * wechat php test
  4   */
  5 
  6 //define your token
  7 define("TOKEN", "weixin");
  8 $wechatObj = new wechatCallbackapiTest();
  9 //$wechatObj->valid();//接口验证
 10 $wechatObj->responseMsg();//调用回复消息方法
 11 class wechatCallbackapiTest
 12 {
 13     public function valid()
 14     {
 15         $echoStr = $_GET["echostr"];
 16 
 17         //valid signature , option
 18         if($this->checkSignature()){
 19             echo $echoStr;
 20             exit;
 21         }
 22     }
 23 
 24     public function responseMsg()
 25     {
 26         //get post data, May be due to the different environments
 27         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
 28 
 29           //extract post data
 30         if (!empty($postStr)){
 31                 /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
 32                    the best way is to check the validity of xml by yourself */
 33                 libxml_disable_entity_loader(true);
 34                   $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
 35                 $fromUsername = $postObj->FromUserName;
 36                 $toUsername = $postObj->ToUserName;
 37                 $keyword = trim($postObj->Content);
 38                 $time = time();
 39                 $msgType = $postObj->MsgType;//消息类型
 40                 $event = $postObj->Event;//时间类型，subscribe（订阅）、unsubscribe（取消订阅）
 41                 $textTpl = " 42                              43                              44                             %s 45                              46                              47                             0 48                             "; 
 49                            
 50                 switch($msgType){
 51                     case "event":
 52                     if($event=="subscribe"){
 53                         $contentStr = "Hi,欢迎关注海仙日用百货!"."\n"."回复数字'1',了解店铺地址."."\n"."回复数字'2',了解商品种类.";
 54                     } 
 55                     break;
 56                     case "text":
 57                         switch($keyword){
 58                             case "1":
 59                             $contentStr = "店铺地址："."\n"."杭州市江干艮山西路233号新东升市场地下室第一排.";    
 60                             break;
 61                             case "2":
 62                             $contentStr = "商品种类:"."\n"."杯子、碗、棉签、水桶、垃圾桶、洗碗巾(刷)、拖把、扫把、"
 63                                          ."衣架、粘钩、牙签、垃圾袋、保鲜袋(膜)、剪刀、水果刀、饭盒等.";
 64                             break;
 65                             default:
 66                             $contentStr = "对不起,你的内容我会稍后回复";
 67                         }
 68                     break;
 69                 }
 70                 $msgType = "text";
 71                 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
 72                 echo $resultStr;
 73         }else {
 74             echo "";
 75             exit;
 76         }
 77     }
 78         
 79     private function checkSignature()
 80     {
 81         // you must define TOKEN by yourself
 82         if (!defined("TOKEN")) {
 83             throw new Exception('TOKEN is not defined!');
 84         }
 85         
 86         $signature = $_GET["signature"];
 87         $timestamp = $_GET["timestamp"];
 88         $nonce = $_GET["nonce"];
 89                 
 90         $token = TOKEN;
 91         $tmpArr = array($token, $timestamp, $nonce);
 92         // use SORT_STRING rule
 93         sort($tmpArr, SORT_STRING);
 94         $tmpStr = implode( $tmpArr );
 95         $tmpStr = sha1( $tmpStr );
 96         
 97         if( $tmpStr == $signature ){
 98             return true;
 99         }else{
100             return false;
101         }
102     }
103 }
104 
105 
106 ?>

关键词回复和关注回复