php微信公众平台交互与接口详解

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"=>"","Url" =>"http://m.cnblogs.com/?u=txw1958");
$content[] = array("Title"=>"多图文2标题","PicUrl"=>"http://d.hiphotos.bdimg.com/wisegame/pic/item/f3529822720e0cf3ac9f1ada0846f21fbe09aaa3.jpg","Url" =>"http://m.cnblogs.com/?u=txw1958");
$content[] = array("Title"=>"多图文3标题","PicUrl"=>"http://g.hiphotos.bdimg.com/wisegame/pic/item/18cb0a46f21fbe090d338acc6a600c338644adfd.jpg",$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 = " %s "; $result = sprintf($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 = " ";

$item_str = sprintf($itemTpl,$imageArray['MediaId']);

$textTpl = "

$result = sprintf($textTpl,time());
return $result;
}

/*

• 回复语音消息
  */
  private function transmitVoice($object,$voiceArray)
  {
  $itemTpl = " ";

$item_str = sprintf($itemTpl,$voiceArray['MediaId']);

$textTpl = "

$result = sprintf($textTpl,time());
return $result;
}

/*

• 回复视频消息
  */
  private function transmitVideo($object,$videoArray)
  {
  $itemTpl = "";

$item_str = sprintf($itemTpl,$videoArray['MediaId'],$videoArray['ThumbMediaId'],$videoArray['Title'],$videoArray['Description']);

$textTpl = "

$result = sprintf($textTpl,time());
return $result;
}

/*

• 回复图文消息
  */
  private function transmitNews($object,$arr_item)
  {
  if(!is_array($arr_item))
  return;

$itemTpl = "

$newsTpl = "

$result = sprintf($newsTpl,count($arr_item));
return $result;
}

/*

• 回复音乐消息
  */
  private function transmitMusic($object,$musicArray)
  {
  $itemTpl = " ";

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

$textTpl = "

$result = sprintf($textTpl,time());
return $result;
}
}
?>