微信开发之带你快速查询城市天气

微信http://www.php.cn/php/php-tp-demand.html" target="_blank">查询城市天气，首先，你需要找到一个获取天气的API，此处，用的是百度的apistore，可以去百度申请和使用API。

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';$header = array( 'apikey: ',//你的apikey);// 添加apikey到headercurl_setopt($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($postObj->MsgType == 'event'){ //如果XML信息里消息类型为eventif($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headercurl_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(=0?