微信公众平台开发入门教程（五）回复不同消息

定义回复消息处理函数

1、文本消息

    private function transmitText($object, $content, $flag = 0)
    {
        $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
<FuncFlag>%d</FuncFlag>
</xml>";
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
        return $resultStr;
    }

2、图文消息

    private function transmitNews($object, $arr_item, $flag = 0)
    {
        if(!is_array($arr_item))
            return;

        $itemTpl = "    <item>
        <Title><![CDATA[%s]]></Title>
        <Description><![CDATA[%s]]></Description>
        <PicUrl><![CDATA[%s]]></PicUrl>
        <Url><![CDATA[%s]]></Url>
    </item>
";
        $item_str = "";
        foreach ($arr_item as $item)
            $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['Picurl'], $item['Url']);

        $newsTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[news]]></MsgType>
<Content><![CDATA[]]></Content>
<ArticleCount>%s</ArticleCount>
<Articles>
$item_str</Articles>
<FuncFlag>%s</FuncFlag>
</xml>";

        $resultStr = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item), $flag);
        return $resultStr;
    }
    

3、音乐消息

   
    private function transmitMusic($object, $musicArray, $flag = 0)
    {
        $itemTpl = "<Music>
    <Title><![CDATA[%s]]></Title>
    <Description><![CDATA[%s]]></Description>
    <MusicUrl><![CDATA[%s]]></MusicUrl>
    <HQMusicUrl><![CDATA[%s]]></HQMusicUrl>
</Music>";

        $item_str = sprintf($itemTpl, $musicArray['Title'], $musicArray['Description'], $musicArray['MusicUrl'], $musicArray['HQMusicUrl']);

        $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[music]]></MsgType>
$item_str
<FuncFlag>%d</FuncFlag>
</xml>";

        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $flag);
        return $resultStr;
    }

  原文：http://www.cnblogs.com/txw1958/p/wechat-tutorial.html 

构造不同回复消息类型

1、回复文本

        if($keyword == "文本"){
            $contentStr = "这是个文本消息";
            $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        }

2、回复单图文

        else if($keyword == "图文" || $keyword == "单图文"){
            $dateArray = array();
            $dateArray[] = array("Title"=>"单图文标题", 
                                "Description"=>"单图文内容", 
                                "Picurl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", 
                                "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $resultStr = $this->transmitNews($object, $dateArray, $funcFlag);
        }

3、回复多图文

        else if($keyword == "多图文"){
            $dateArray = array();
            $dateArray[] = array("Title"=>"多图文1标题", "Description"=>"", "Picurl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $dateArray[] = array("Title"=>"多图文2标题", "Description"=>"", "Picurl"=>"http://d.hiphotos.bdimg.com/wisegame/pic/item/f3529822720e0cf3ac9f1ada0846f21fbe09aaa3.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $dateArray[] = array("Title"=>"多图文3标题", "Description"=>"", "Picurl"=>"http://g.hiphotos.bdimg.com/wisegame/pic/item/18cb0a46f21fbe090d338acc6a600c338644adfd.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $resultStr = $this->transmitNews($object, $dateArray, $funcFlag);
        }

4、回复音乐

        else if($keyword == "音乐"){
            $musicArray = array("Title"=>"最炫民族风", "Description"=>"歌手：凤凰传奇", "MusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3","HQMusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3");$resultStr = $this->transmitMusic($object, $musicArray, $funcFlag);
        }

  原文：http://www.cnblogs.com/txw1958/p/wechat-tutorial.html 

完整代码

/*
方倍工作室 
http://www.cnblogs.com/txw1958/
*/

define("TOKEN", "pondbay");

$wechatObj = new wechatCallbackapiTest();
if (isset($_GET['echostr'])) {
    $wechatObj->valid();
}else{
    $wechatObj->responseMsg();
}

class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];
        if($this->checkSignature()){
            echo $echoStr;
            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;
        }
    }

    public function responseMsg()
    {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if (!empty($postStr)){
            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
            $RX_TYPE = trim($postObj->MsgType);

            switch ($RX_TYPE)
            {
                case "text":
                    $resultStr = $this->receiveText($postObj);
                    break;
            }
            echo $resultStr;
        }else {
            echo "";
            exit;
        }
    }

    private function receiveText($object)
    {
        $funcFlag = 0;
        $keyword = trim($object->Content);
        $resultStr = "";
        $contentStr = "";

        if($keyword == "文本"){
            $contentStr = "这是个文本消息";
            $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        }
        else if($keyword == "图文" || $keyword == "单图文"){
            $dateArray = array();
            $dateArray[] = array("Title"=>"单图文标题", 
                                "Description"=>"单图文内容", 
                                "Picurl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", 
                                "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $resultStr = $this->transmitNews($object, $dateArray, $funcFlag);
        }
        else if($keyword == "多图文"){
            $dateArray = array();
            $dateArray[] = array("Title"=>"多图文1标题", "Description"=>"", "Picurl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $dateArray[] = array("Title"=>"多图文2标题", "Description"=>"", "Picurl"=>"http://d.hiphotos.bdimg.com/wisegame/pic/item/f3529822720e0cf3ac9f1ada0846f21fbe09aaa3.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $dateArray[] = array("Title"=>"多图文3标题", "Description"=>"", "Picurl"=>"http://g.hiphotos.bdimg.com/wisegame/pic/item/18cb0a46f21fbe090d338acc6a600c338644adfd.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958");
            $resultStr = $this->transmitNews($object, $dateArray, $funcFlag);
        }
        else if($keyword == "音乐"){
            $musicArray = array("Title"=>"最炫民族风", "Description"=>"歌手：凤凰传奇", "MusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3","HQMusicUrl"=>"http://121.199.4.61/music/zxmzf.mp3");
            $resultStr = $this->transmitMusic($object, $musicArray, $funcFlag);
        }
        return $resultStr;
    }

    private function receiveEvent($object)
    {
        $contentStr = "";
        switch ($object->Event)
        {
            case "subscribe":
                $contentStr = "欢迎关注方倍工作室";
                break;  
        }
        $resultStr = $this->transmitText($object, $contentStr);
        return $resultStr;
    }

    private function transmitText($object, $content, $flag = 0)
    {
        $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
<FuncFlag>%d</FuncFlag>
</xml>";
        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
        return $resultStr;
    }

    private function transmitNews($object, $arr_item, $flag = 0)
    {
        if(!is_array($arr_item))
            return;

        $itemTpl = "    <item>
        <Title><![CDATA[%s]]></Title>
        <Description><![CDATA[%s]]></Description>
        <PicUrl><![CDATA[%s]]></PicUrl>
        <Url><![CDATA[%s]]></Url>
    </item>
";
        $item_str = "";
        foreach ($arr_item as $item)
            $item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['Picurl'], $item['Url']);

        $newsTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[news]]></MsgType>
<Content><![CDATA[]]></Content>
<ArticleCount>%s</ArticleCount>
<Articles>
$item_str</Articles>
<FuncFlag>%s</FuncFlag>
</xml>";

        $resultStr = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item), $flag);
        return $resultStr;
    }
    
    private function transmitMusic($object, $musicArray, $flag = 0)
    {
        $itemTpl = "<Music>
    <Title><![CDATA[%s]]></Title>
    <Description><![CDATA[%s]]></Description>
    <MusicUrl><![CDATA[%s]]></MusicUrl>
    <HQMusicUrl><![CDATA[%s]]></HQMusicUrl>
</Music>";

        $item_str = sprintf($itemTpl, $musicArray['Title'], $musicArray['Description'], $musicArray['MusicUrl'], $musicArray['HQMusicUrl']);

        $textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[music]]></MsgType>
$item_str
<FuncFlag>%d</FuncFlag>
</xml>";

        $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $flag);
        return $resultStr;
    }
}