微信公众平台开发PHP版

### 1. 在微信公众平台测试版申请账号

http://mp.weixin.qq.com/debug/cgi-bin/sandboxinfo?action=showinfo&t=sandbox/index

URL填写你的服务器域名地址，Token随便写。

### 2. 进入[文档](http://mp.weixin.qq.com/wiki/index.php?title=%E6%B6%88%E6%81%AF%E6%8E%A5%E5%8F%A3%E6%8C%87%E5%8D%97 "文档")，查找示例

下载最下面的示例代码，打开，复制文件内容，到服务器文件上。

<?php
    /**
      * wechat php test
      */
     
    //define your token
    define("TOKEN", "woshihaoren");　//这里改成你前面填写的
    $wechatObj = new wechatCallbackapiTest();
    $wechatObj->valid();
     
    class wechatCallbackapiTest
    {
        public function valid()
        {
            $echoStr = $_GET["echostr"];
     
            //valid signature , option
            if($this->checkSignature()){
                echo $echoStr;
                $this->responseMsg();//后加的调用那个函数
                exit;
            }
        }
     
        public function responseMsg()
        {
            //get post data, May be due to the different environments
            $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
     
              //extract post data
            if (!empty($postStr)){
                    
                      $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                    $fromUsername = $postObj->FromUserName;
                    $toUsername = $postObj->ToUserName;
                    $keyword = trim($postObj->Content);
                    $time = time();
                    $textTpl = "<xml>
                                <ToUserName><![CDATA[%s]]></ToUserName>
                                <FromUserName><![CDATA[%s]]></FromUserName>
                                <CreateTime>%s</CreateTime>
                                <MsgType><![CDATA[%s]]></MsgType>
                                <Content><![CDATA[%s]]></Content>
                                <FuncFlag>0</FuncFlag>
                                </xml>";             
                    if(!empty( $keyword ))
                    {
                          $msgType = "text";
                        $contentStr = "Welcome to wechat world!";
                        $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                        echo $resultStr;
                    }else{
                        echo "Input something...";
                    }
     
            }else {
                echo "";
                exit;
            }
        }
            
        private function checkSignature()
        {
            $signature = $_GET["signature"];
            $timestamp = $_GET["timestamp"];
            $nonce = $_GET["nonce"];    
                    
            $token = TOKEN;
            $tmpArr = array($token, $timestamp, $nonce);
            sort($tmpArr);
            $tmpStr = implode( $tmpArr );
            $tmpStr = sha1( $tmpStr );
            
            if( $tmpStr == $signature ){
                return true;
            }else{
                return false;
            }
        }
    }
     
    ?>

### 3. 关注公众号，查看用户列表信息
地址：mp.weixin.qq.com/debug/cgi-bin/sandboxinfo?action=showinfo&t=sandbox/index

教程：[http://blog.csdn.net/dongsg11200/article/details/22046583](http://blog.csdn.net/dongsg11200/article/details/22046583 "http://blog.csdn.net/dongsg11200/article/details/22046583")

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