header('Content-type:text/html;charset=UTF-8');

$ch = curl_init();
$url = 'http://apis.baidu.com/apistore/weatherservice/cityname"<pre>";
print_r($res);
echo "</pre>";

$contentStr = "";

foreach($res as $k=>$v){
 if($k == "retData"){
 $contentStr = "城市：" . $v['city'] . "\n";
 $contentStr .= "日期：" . $v['date'] . "\n";
 $contentStr .= "天气：" . $v['weather'] ."\n";
 $contentStr .= "平均气温：" . $v['temp'] . "℃\n";
 $contentStr .= "最低气温：" . $v['l_tmp'] ."℃\n";
 $contentStr .= "最高气温：" . $v['h_tmp'] . "℃\n";
 $contentStr .= "风力：" . $v['WS'] . "\n";
 $contentStr .= "风向：" . $v['WD'] . "\n";
 $contentStr .= "日出时间：" . $v['sunrise'] . "\n";
 $contentStr .= "日落时间：" . $v['sunset'] . "\n";
 $contentStr .= "经度：" . $v['longitude'] . "\n";
 $contentStr .= "纬度：" . $v['latitude'];
 }
}

echo $contentStr;

 public function responseMsg(){
 
<span style="white-space:pre"> </span>//get post data, May be due to the different environments
 $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信发来的XML数据

 //extract post data
 if(!empty($postStr)){
  
  //解析post来的XML为一个对象$postObj
  $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
 
  $fromUsername = $postObj->FromUserName; //请求消息的用户
  $toUsername = $postObj->ToUserName; //"我"的公众号id
  $keyword = trim($postObj->Content); //用户发送的消息内容
  $time = time(); //时间戳
  $msgtype = 'text'; //消息类型：文本
  $textTpl = "<xml>
 <ToUserName><![CDATA[%s]]></ToUserName>
 <FromUserName><![CDATA[%s]]></FromUserName>
 <CreateTime>%s</CreateTime>
 <MsgType><![CDATA[%s]]></MsgType>
 <Content><![CDATA[%s]]></Content>
 </xml>";

  if($postObj->MsgType == 'event'){ //如果XML信息里消息类型为event
  if($postObj->Event == 'subscribe'){ //如果是订阅事件
   $contentStr = "欢迎订阅misaka去年夏天！\n更多精彩内容：http://blog.csdn.net/misakaqunianxiatian";
   $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
   echo $resultStr;
   exit();
  }
  }

  $which = mb_substr($keyword, 0, 2, 'UTF-8');//获取要返回什么样的信息

  if($which== "翻译"){ //如果要进行翻译
  //调用有道翻译API进行翻译

  }elseif($which == "天气"){
  $wea = $which;
  $city = str_replace($wea, "", $keyword);

  $ch = curl_init();
  $url = 'http://apis.baidu.com/apistore/weatherservice/cityname"";
  foreach($res as $k=>$v){

   if($k == "retData"){
   $contentStr = "城市：" . $v['city'] . "\n";
   $contentStr .= "日期：" . $v['date'] . "\n";
   $contentStr .= "天气：" . $v['weather'] ."\n";
   $contentStr .= "平均气温：" . $v['temp'] . "℃\n";
   $contentStr .= "最低气温：" . $v['l_tmp'] ."℃\n";
   $contentStr .= "最高气温：" . $v['h_tmp'] . "℃\n";
   $contentStr .= "风力：" . $v['WS'] . "\n";
   $contentStr .= "风向：" . $v['WD'] . "\n";
   $contentStr .= "日出时间：" . $v['sunrise'] . "\n";
   $contentStr .= "日落时间：" . $v['sunset'] . "\n";
   $contentStr .= "经度：" . $v['longitude'] . "\n";
   $contentStr .= "纬度：" . $v['latitude'];
   }
  }
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();

  }else{
  $contentStr = "输入翻译XXX可以进行翻译(=";
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();
  }