微信订阅号开发之token验证后，自动回复消息功能做好，发送消息没有返回

 1 <?php
 2 /**
 3   * wechat php test
 4   */
 5 
 6 //define your token
 7 define("TOKEN", "codcodog");
 8 
 9 $wechatObj = new wechatCallbackapiTest();
10 //$wechatObj->valid();
11 $wechatObj->responseMsg();
12 
13 class wechatCallbackapiTest
14 {
15     public function valid()
16     {
17         $echoStr = $_GET["echostr"];
18 
19         //valid signature , option
20         if($this->checkSignature()){
21         header(‘content-type:text‘);
22             echo $echoStr;
23             exit;
24         }
25     }
26 
27     public function responseMsg()
28     {
29         //get post data, May be due to the different environments
30         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
31         //$postStr = file_get_contents("php://input");
32         file_put_contents("log.txt",$postStr,FILE_APPEND );
33           //extract post data
34         if (!empty($postStr)){
35                 /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
36                    the best way is to check the validity of xml by yourself */
37                 libxml_disable_entity_loader(true);
38                   $postObj = simplexml_load_string($postStr, ‘SimpleXMLElement‘, LIBXML_NOCDATA);
39                 $fromUsername = $postObj->FromUserName; //用户
40                 $toUsername = $postObj->ToUserName;     //公众平台
41                 $keyword = trim($postObj->Content);
42                 $time = time();
43                 $textTpl = "<xml>
44                             <ToUserName><![CDATA[%s]]></ToUserName>
45                             <FromUserName><![CDATA[%s]]></FromUserName>
46                             <CreateTime>%s</CreateTime>
47                             <MsgType><![CDATA[%s]]></MsgType>
48                             <Content><![CDATA[%s]]></Content>
49                             <FuncFlag>0</FuncFlag>
50                             </xml>";             
51                 if(!empty( $keyword ))
52                 {
53                       $msgType = "text";
54                     $contentStr = "Welcome to wechat world!";
55                     $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
56                     echo $resultStr;
57                 }else{
58                     echo "Input something...";
59                 }
60 
61         }else {
62             echo "";
63             exit;
64         }
65     }
66         
67     private function checkSignature()
68     {
69         // you must define TOKEN by yourself
70         if (!defined("TOKEN")) {
71             throw new Exception(‘TOKEN is not defined!‘);
72         }
73         
74         $signature = $_GET["signature"];
75         $timestamp = $_GET["timestamp"];
76         $nonce = $_GET["nonce"];
77                 
78         $token = TOKEN;
79         $tmpArr = array($token, $timestamp, $nonce);
80         // use SORT_STRING rule
81         sort($tmpArr, SORT_STRING);
82         $tmpStr = implode( $tmpArr );
83         $tmpStr = sha1( $tmpStr );
84         
85         if( $tmpStr == $signature ){
86             return true;
87         }else{
88             return false;
89         }
90     }
91 }
92 
93 
94 ?>