PHP WeChat development to obtain city weather

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);
// 执行HTTP请求
curl_setopt($ch , CURLOPT_URL , $url);
$res = curl_exec($ch);

$res = json_decode($res, true);
echo "<pre class="brush:php;toolbar:false">";
print_r($res);
echo "

 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, &#39;SimpleXMLElement&#39;, 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 = &#39;text&#39;; //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($postObj->MsgType == &#39;event&#39;){ //如果XML信息里消息类型为event
  if($postObj->Event == &#39;subscribe&#39;){ //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, &#39;UTF-8&#39;);//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 = &#39;http://apis.baidu.com/apistore/weatherservice/cityname?cityname=&#39; . $city;
  $header = array(&#39;apikey: &#39;); //此处的apikey使用自己申请的apikey，填在冒号之后

  // 添加apikey到header
  curl_setopt($ch, CURLOPT_HTTPHEADER , $header);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  // 执行HTTP请求
  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[&#39;city&#39;] . "\n";
   $contentStr .= "日期：" . $v[&#39;date&#39;] . "\n";
   $contentStr .= "天气：" . $v[&#39;weather&#39;] ."\n";
   $contentStr .= "平均气温：" . $v[&#39;temp&#39;] . "℃\n";
   $contentStr .= "最低气温：" . $v[&#39;l_tmp&#39;] ."℃\n";
   $contentStr .= "最高气温：" . $v[&#39;h_tmp&#39;] . "℃\n";
   $contentStr .= "风力：" . $v[&#39;WS&#39;] . "\n";
   $contentStr .= "风向：" . $v[&#39;WD&#39;] . "\n";
   $contentStr .= "日出时间：" . $v[&#39;sunrise&#39;] . "\n";
   $contentStr .= "日落时间：" . $v[&#39;sunset&#39;] . "\n";
   $contentStr .= "经度：" . $v[&#39;longitude&#39;] . "\n";
   $contentStr .= "纬度：" . $v[&#39;latitude&#39;];
   }
  }
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();

  }else{
  $contentStr = "输入翻译XXX可以进行翻译(=・ω・=)\n\n输入天气XX可以查询城市天气";
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();
  }