Ausführliche Erklärung und Beispiele des Entwicklungsprozesses des PHP-Andockens der Nachrichtenschnittstelle der öffentlichen WeChat-Plattform

<?php
define("TOKEN", "weixin");//自己定义的token 就是个通信的私钥
$wechatObj = new wechatCallbackapiTest();
$wechatObj->valid();
//$wechatObj->responseMsg();
class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }
    public function responseMsg()
    {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if (!empty($postStr)){
            $postObj = simplexml_load_string($postStr, &#39;SimpleXMLElement&#39;, 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 = &#39;你好啊，屌丝&#39;;
                $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                echo $resultStr;
            }else{
                echo &#39;咋不说哈呢&#39;;
            }
        }else {
            echo &#39;咋不说哈呢&#39;;
            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;
        }
    }
}
?>

<?php
class Weixin
{
    public $token = &#39;&#39;;//token
    public $debug =  false;//是否debug的状态标示，方便我们在调试的时候记录一些中间数据
    public $setFlag = false;
    public $msgtype = &#39;text&#39;;   //(&#39;text&#39;,&#39;image&#39;,&#39;location&#39;)
    public $msg = array();
    public function __construct($token,$debug)
    {
        $this->token = $token;
        $this->debug = $debug;
    }
    //获得用户发过来的消息（消息内容和消息类型  ）
    public function getMsg()
    {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if ($this->debug) {
                        $this->write_log($postStr);
        }
        if (!empty($postStr)) {
            $this->msg = (array)simplexml_load_string($postStr, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA);
            $this->msgtype = strtolower($this->msg[&#39;MsgType&#39;]);
        }
    }
　　//回复文本消息
    public function makeText($text=&#39;&#39;)
    {
        $CreateTime = time();
        $FuncFlag = $this->setFlag ? 1 : 0;
        $textTpl = "<xml>
            <ToUserName><![CDATA[{$this->msg[&#39;FromUserName&#39;]}]]></ToUserName>
            <FromUserName><![CDATA[{$this->msg[&#39;ToUserName&#39;]}]]></FromUserName>
            <CreateTime>{$CreateTime}</CreateTime>
            <MsgType><![CDATA
            1  
            ]></MsgType>
            <Content><![CDATA[%s]]></Content>
            <FuncFlag>%s</FuncFlag>
            </xml>";
        return sprintf($textTpl,$text,$FuncFlag);
    }
    //根据数组参数回复图文消息
    public function makeNews($newsData=array())
    {
        $CreateTime = time();
        $FuncFlag = $this->setFlag ? 1 : 0;
        $newTplHeader = "<xml>
            <ToUserName><![CDATA[{$this->msg[&#39;FromUserName&#39;]}]]></ToUserName>
            <FromUserName><![CDATA[{$this->msg[&#39;ToUserName&#39;]}]]></FromUserName>
            <CreateTime>{$CreateTime}</CreateTime>
            <MsgType><![CDATA[news]]></MsgType>
            <Content><![CDATA[%s]]></Content>
            <ArticleCount>%s</ArticleCount><Articles>";
        $newTplItem = "<item>
            <Title><![CDATA[%s]]></Title>
            <Description><![CDATA[%s]]></Description>
            <PicUrl><![CDATA[%s]]></PicUrl>
            <Url><![CDATA[%s]]></Url>
            </item>";
        $newTplFoot = "</Articles>
            <FuncFlag>%s</FuncFlag>
            </xml>";
        $Content = &#39;&#39;;
        $itemsCount = count($newsData[&#39;items&#39;]);
        $itemsCount = $itemsCount < 10 ? $itemsCount : 10;//微信公众平台图文回复的消息一次最多10条
        if ($itemsCount) {
            foreach ($newsData[&#39;items&#39;] as $key => $item) {
                if ($key<=9) {
                    $Content .= sprintf($newTplItem,$item[&#39;title&#39;],$item[&#39;description&#39;],$item[&#39;picurl&#39;],$item[&#39;url&#39;]);
                }
            }
        }
        $header = sprintf($newTplHeader,$newsData[&#39;content&#39;],$itemsCount);
        $footer = sprintf($newTplFoot,$FuncFlag);
        return $header . $Content . $footer;
    }
    public function reply($data)
    {
        if ($this->debug) {
                    $this->write_log($data);
        }
        echo $data;
    }
    public function valid()
    {
        if ($this->checkSignature()) {
            if( $_SERVER[&#39;REQUEST_METHOD&#39;]==&#39;GET&#39; )
            {
                echo $_GET[&#39;echostr&#39;];
                exit;
            }
        }else{
            write_log(&#39;认证失败&#39;);
            exit;
        }
    }
    private function checkSignature()
    {
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
        $tmpArr = array($this->token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
    private function write_log($log){
        //这里是你记录调试信息的地方  请自行完善   以便中间调试
    }
}
?>

<?php
include_once(&#39;weixin.class.php&#39;);//引用刚定义的微信消息处理类
define("TOKEN", "mmhelper");
define(&#39;DEBUG&#39;, true);
$weixin = new Weixin(TOKEN,DEBUG);//实例化
$weixin->getMsg();
$type = $weixin->msgtype;//消息类型
$username = $weixin->msg[&#39;FromUserName&#39;];//哪个用户给你发的消息,这个$username是微信加密之后的，但是每个用户都是一一对应的
if ($type===&#39;text&#39;) {
    if ($weixin->msg[&#39;Content&#39;]==&#39;Hello2BizUser&#39;) {//微信用户第一次关注你的账号的时候，你的公众账号就会受到一条内容为&#39;Hello2BizUser&#39;的消息
        $reply = $weixin->makeText(&#39;欢迎你关注哦，屌丝&#39;);
    }else{//这里就是用户输入了文本信息
        $keyword = $weixin->msg[&#39;Content&#39;];   //用户的文本消息内容
                include_once("chaxun.php");//文本消息 调用查询程序 
                $chaxun= new chaxun(DEBUG,$keyword,$username);
                $results[&#39;items&#39;] =$chaxun->search();//查询的代码
                $reply = $weixin->makeNews($results);
    }
}elseif ($type===&#39;location&#39;) {
      //用户发送的是位置信息  稍后的文章中会处理                 
}elseif ($type===&#39;image&#39;) {
      //用户发送的是图片 稍后的文章中会处理
}elseif ($type===&#39;voice&#39;) {    
      //用户发送的是声音 稍后的文章中会处理
}
$weixin->reply($reply);
?>