微信公众平台开发（五） 天气预报功能开发

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);
$RX_TYPE = trim($postObj->MsgType);

switch($RX_TYPE)
{
 case "text":
  $resultStr = $this->handleText($postObj);
  break;
 case "event":
  $resultStr = $this->handleEvent($postObj);
  break;
 default:
  $resultStr = "Unknow msg type: ".$RX_TYPE;
  break;
}
echo $resultStr;

}else {
echo "";
exit;
}
}

public function handleText($postObj)
{
$fromUsername = $postObj->FromUserName;
$toUsername = $postObj->ToUserName;
$keyword = trim($postObj->Content);
$time = time();
$textTpl = "

//天气
$str = mb_substr($keyword,"UTF-8");
$str_key = mb_substr($keyword,"UTF-8");
if($str == '天气' && !empty($str_key)){
$data = $this->weather($str_key);
if(empty($data->weatherinfo)){
$contentStr = "抱歉，没有查到\"".$str_key."\"的天气信息！";
} else {
$contentStr = "【".$data->weatherinfo->city."天气预报】\n".$data->weatherinfo->date_y." ".$data->weatherinfo->fchh."时发布"."\n\n实时天气\n".$data->weatherinfo->weather1." ".$data->weatherinfo->temp1." ".$data->weatherinfo->wind1."\n\n温馨提示：".$data->weatherinfo->index_d."\n\n明天\n".$data->weatherinfo->weather2." ".$data->weatherinfo->temp2." ".$data->weatherinfo->wind2."\n\n后天\n".$data->weatherinfo->weather3." ".$data->weatherinfo->temp3." ".$data->weatherinfo->wind3;
}
} else {
$contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待...";
}
$resultStr = sprintf($textTpl,$fromUsername,$toUsername,$time,$msgType,$contentStr);
echo $resultStr;
}else{
echo "Input something...";
}
}

public function handleEvent($object)
{
$contentStr = "";
switch ($object->Event)
{
case "subscribe":
$contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待...";
break;
default :
$contentStr = "Unknow Event: ".$object->Event;
break;
}
$resultStr = $this->responseText($object,$contentStr);
return $resultStr;
}

public function responseText($object,$content,$flag=0)
{
$textTpl = "

private function weather($n){
include("weather_cityId.PHP");
$c_name=$weather_cityId[$n];
if(!empty($c_name)){
$json=file_get_contents("http://m.weather.com.cn/data/".$c_name.".html");
return json_decode($json);
} else {
return null;
}
}

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;
}
}
}

?>