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 wechatCallbackapiTest12 {13     public function valid()14     {15         $echoStr = $_GET["echostr"];16 17         //valid signature , option18         if($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 environments27         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];28 29           //extract post data30         if (!empty($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 = "<xml>40                             <ToUserName><![CDATA[%s]]></ToUserName>41                             <FromUserName><![CDATA[%s]]></FromUserName>42                             <CreateTime>%s</CreateTime>43                             <MsgType><![CDATA[%s]]></MsgType>44                             <Content><![CDATA[%s]]></Content>45                             <FuncFlag>0</FuncFlag>46                             </xml>";             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 yourself66         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, $nonce);76         // use SORT_STRING rule77         sort($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 wechatCallbackapiTest12 {13     public function valid()14     {15         $echoStr = $_GET["echostr"];16 17         //valid signature , option18         if($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 environments27         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];28 29           //extract post data30         if (!empty($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 = "<xml>40                             <ToUserName><![CDATA[%s]]></ToUserName>41                             <FromUserName><![CDATA[%s]]></FromUserName>42                             <CreateTime>%s</CreateTime>43                             <MsgType><![CDATA[%s]]></MsgType>44                             <Content><![CDATA[%s]]></Content>45                             <FuncFlag>0</FuncFlag>46                             </xml>";             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 yourself66         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, $nonce);76         // use SORT_STRING rule77         sort($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                 $textTpl = "<xml> 42                             <ToUserName><![CDATA[%s]]></ToUserName> 43                             <FromUserName><![CDATA[%s]]></FromUserName> 44                             <CreateTime>%s</CreateTime> 45                             <MsgType><![CDATA[%s]]></MsgType> 46                             <Content><![CDATA[%s]]></Content> 47                             <FuncFlag>0</FuncFlag> 48                             </xml>";  49                             50                 switch($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