微信开发之带你快速查询城市天气-微信开发

登录百度账号，并用手机发送请求获取apikey。有了apikey，可以按照它的示例来请求城市天气了。（可以按照城市中文名，拼音，城市编号等来查询）

你可以现在本地做测试，请求完成之后，再放到自己的域名空间的脚本里。

测试的脚本例如：（注意apikey填写自己申请的）

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>";
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;

如果你填写了自己的apikey，那么应该能获取到所请求的天气了：

如果能返回正常的数据了，那么就可以放到你的域名空间里了。（公众平台里开发者中心填写的url，该url有连接微信接口等功能）

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?cityname=' . $city;
  $header = array('apikey: '); //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['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(=・ω・=)nn输入天气XX可以查询城市天气";
  $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
  echo $resultStr;
  exit();
  }

完成之后（别忘了填写apikey），你的订阅号里，输入天气上海，那么应该能查到上海当天的天气了。

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