<?php
//
// 响应用户消息
// 微信公众账号响应给用户的不同消息类型
//微信服务器要和后台服务器进行通信首先要进行token验证，微信会通过get方式发送signature（微信加密签名）、nonce（随机数）、timestamp（时间戳）、echostr（随机字符串）。后台服务器获取之后会将timestamp、nonce与自身定义的TOKEN按照一定的顺序拼接成字符串，通过shal加密后获得的结果与signature进行对比，如果相同则把echostr返回给微信服务器。 表示验证成功。
header("content-type:text;charset=utf8");
define("TOKEN", "weixin");
//token验证是通过get传输数据，微信用户发送的数据通过post方式发送。先进行get请求，再进行post请求。
$wechatObj = new wechatCallbackapiTest();
//判断是get请求还是post请求。$_GET['echostr']如果存在，表示是进行token验证的get请求。反之是传输数据的post请求。
if (!isset($_GET['echostr'])) {
$wechatObj->responseMsg();//响应数据
}else{
$wechatObj->valid();//响应
}
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);//对数组中的元素进行排序
$tmpStr = implode($tmpArr);//将数组中的元素连接成一个字符串
$tmpStr = sha1($tmpStr);//对字符串进行加密操作。
if($tmpStr == $signature){
return true;
}else{
return false;
}
}
public function responseMsg()
{
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];//获取发送过来的数据。
if (!empty($postStr)){
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', );//把xml字符串载入到一个SimpleXMLelement对象中。simplexml_load_string()是一种xml解析器。
$RX_TYPE = trim($postObj->MsgType);//trim去掉字符串两端kongge。
//用户发送的消息类型判断
switch ($RX_TYPE)
{
case "text":
$result = $this->receiveText($postObj);
break;
case "image":
$result = $this->receiveImage($postObj);
break;
case "voice":
$result = $this->receiveVoice($postObj);
break;
case "video":
$result = $this->receiveVideo($postObj);
break;
default:
$result = "unknow msg type: ".$RX_TYPE;
break;
}
echo $result;
}else {
echo "";
exit;
}
}
private function receiveText($object)
{
$keyword = trim($object->Content);
if($keyword == "文本"){
//回复文本消息
$content = "这是个文本消息";
$result = $this->transmitText($object, $content);
}
else if($keyword == "图文" || $keyword == "单图文"){
//回复单图文消息
$content = array();
$content[] = 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");
$result = $this->transmitNews($object, $content);
}
else if($keyword == "多图文"){
//回复多图文消息
$content = array();
$content[] = 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");
$content[] = 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");
$content[] = 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");
$result = $this->transmitNews($object, $content);
}
else if($keyword == "音乐"){
//回复音乐消息
$content = 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");
$result = $this->transmitMusic($object, $content);
}
return $result;
}
private function receiveImage($object)
{
//回复图片消息
$content = array("MediaId"=>$object->MediaId);
$result = $this->transmitImage($object, $content);;
return $result;
}
private function receiveVoice($object)
{
//回复语音消息
$content = array("MediaId"=>$object->MediaId);
$result = $this->transmitVoice($object, $content);;
return $result;
}
private function receiveVideo($object)
{
//回复视频消息
$content = array("MediaId"=>$object->MediaId, "ThumbMediaId"=>$object->ThumbMediaId, "Title"=>"", "Description"=>"");
$result = $this->transmitVideo($object, $content);;
return $result;
}
/*
* 回复文本消息，将要回复的xml消息进行包装。
*/
private function transmitText($object, $content)
{
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[%s]]></Content>
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content);//sprintf（）这个函数的作用还是比较有意思的，可以搜索看看。
return $result;
}
/*
* 回复图片消息
*/
private function transmitImage($object, $imageArray)
{
$itemTpl = "<Image>
<MediaId><![CDATA[%s]]></MediaId>
</Image>";
$item_str = sprintf($itemTpl, $imageArray['MediaId']);
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[image]]></MsgType>
$item_str
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
/*
* 回复语音消息
*/
private function transmitVoice($object, $voiceArray)
{
$itemTpl = "<Voice>
<MediaId><![CDATA[%s]]></MediaId>
</Voice>";
$item_str = sprintf($itemTpl, $voiceArray['MediaId']);
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[voice]]></MsgType>
$item_str
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
/*
* 回复视频消息
*/
private function transmitVideo($object, $videoArray)
{
$itemTpl = "<Video>
<MediaId><![CDATA[%s]]></MediaId>
<ThumbMediaId><![CDATA[%s]]></ThumbMediaId>
<Title><![CDATA[%s]]></Title>
<Description><![CDATA[%s]]></Description>
</Video>";
$item_str = sprintf($itemTpl, $videoArray['MediaId'], $videoArray['ThumbMediaId'], $videoArray['Title'], $videoArray['Description']);
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[video]]></MsgType>
$item_str
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
/*
* 回复图文消息
*/
private function transmitNews($object, $arr_item)
{
if(!is_array($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>
</xml>";
$result = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item));
return $result;
}
/*
* 回复音乐消息
*/
private function transmitMusic($object, $musicArray)
{
$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
</xml>";
$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time());
return $result;
}
}
?>
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