php微信开发之关注事件

//define your token
define("TOKEN","weixin");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();
$wechatObj->responseMsg();
class wechatCallbackapiTest
{
public function valid()
{
$echoStr = $_GET["echostr"];

//valid signature,option
if($this->checkSignature()){
  echo $echoStr;
  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;
    $type = $postObj->MsgType;
    $customevent = $postObj->Event;
    $keyword = trim($postObj->Content);
    $time = time();
    $textTpl = "<xml>
          <ToUserName><![CDATA[%s]]></ToUserName>
          <FromUserName><![CDATA[%s]]></FromUserName>
          <CreateTime>%s</CreateTime>
          <MsgType><![CDATA[%s]]></MsgType>
          <Content><![CDATA[%s]]></Content>
          <FuncFlag>0</FuncFlag>
          </xml>";       
    if($type=="event" and $customrevent=="subscribe"){
      $contentStr = "感谢你的关注n回复1查看联系方式n回复2查看最新资讯n回复3查看法律文书";
      $msgType = "text";
      $resultStr = sprintf($textTpl,$fromUsername,$toUsername,$time,$msgType,$contentStr);
      echo $resultStr;
      }  
    if(!empty( $keyword ))
    {                
      $msgType = "text";
      if($keyword=="1"){
      $contentStr = "qiphon";}
      if($keyword=="2"){
      $contentStr = "test 。";}
      if($keyword=="3"){
      $contentStr = "test333";}         
      $resultStr = sprintf($textTpl,$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;
}

}
}

?>