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

$ch = curl_init();
$url = 'http://apis.baidu.com/apistore/weatherservice/cityname?cityname=上海';
$header = array(
 'apikey: ',//你的apikey
);
// 添加apikey到header
curl_setopt($ch, CURLOPT_HTTPHEADER , $header);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// 執(zhí)行HTTP請求
curl_setopt($ch , CURLOPT_URL , $url);
$res = curl_exec($ch);

$res = json_decode($res, true);
echo "<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 .= "天氣：" . $v['weather'] ."\n";
 $contentStr .= "平均氣溫：" . $v['temp'] . "℃\n";
 $contentStr .= "最低氣溫：" . $v['l_tmp'] ."℃\n";
 $contentStr .= "最高氣溫：" . $v['h_tmp'] . "℃\n";
 $contentStr .= "風力：" . $v['WS'] . "\n";
 $contentStr .= "風向：" . $v['WD'] . "\n";
 $contentStr .= "日出時間：" . $v['sunrise'] . "\n";
 $contentStr .= "日落時間：" . $v['sunset'] . "\n";
 $contentStr .= "經(jīng)度：" . $v['longitude'] . "\n";
 $contentStr .= "緯度：" . $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"]; //接收微信發(fā)來的XML數(shù)據(jù)

 //extract post data
 if(!empty($postStr)){
  
  //解析post來的XML為一個對象$postObj
  $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
 
  $fromUsername = $postObj->FromUserName; //請求消息的用戶
  $toUsername = $postObj->ToUserName; //"我"的公眾號id
  $keyword = trim($postObj->Content); //用戶發(fā)送的消息內(nèi)容
  $time = time(); //時間戳
  $msgtype = 'text'; //消息類型：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($postObj->MsgType == 'event'){ //如果XML信息里消息類型為event
  if($postObj->Event == 'subscribe'){ //如果是訂閱事件
   $contentStr = "歡迎訂閱misaka去年夏天！\n更多精彩內(nèi)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');//獲取要返回什么樣的信息

  if($which== "翻譯"){ //如果要進行翻譯
  //調(diào)用有道翻譯API進行翻譯

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

  $ch = curl_init();
  $url = 'http://apis.baidu.com/apistore/weatherservice/cityname?cityname=' . $city;
  $header = array('apikey: '); //此處的apikey使用自己申請的apikey，填在冒號之后

  // 添加apikey到header
  curl_setopt($ch, CURLOPT_HTTPHEADER , $header);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  // 執(zhí)行HTTP請求
  curl_setopt($ch , CURLOPT_URL , $url);
  $res = curl_exec($ch);
  $res = json_decode($res, true);
  $contentStr = "";
  foreach($res as $k=>$v){

   if($k == "retData"){
   $contentStr = "城市：" . $v['city'] . "\n";
   $contentStr .= "日期：" . $v['date'] . "\n";
   $contentStr .= "天氣：" . $v['weather'] ."\n";
   $contentStr .= "平均氣溫：" . $v['temp'] . "℃\n";
   $contentStr .= "最低氣溫：" . $v['l_tmp'] ."℃\n";
   $contentStr .= "最高氣溫：" . $v['h_tmp'] . "℃\n";
   $contentStr .= "風力：" . $v['WS'] . "\n";
   $contentStr .= "風向：" . $v['WD'] . "\n";
   $contentStr .= "日出時間：" . $v['sunrise'] . "\n";
   $contentStr .= "日落時間：" . $v['sunset'] . "\n";
   $contentStr .= "經(jīng)度：" . $v['longitude'] . "\n";
   $contentStr .= "緯度：" . $v['latitude'];
   }
  }
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();

  }else{
  $contentStr = "輸入翻譯XXX可以進行翻譯(=・ω・=)\n\n輸入天氣XX可以查詢城市天氣";
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();
  }