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用php来写一个天气预报的模块 天气数据是通过采集中国气象网站的。本来中国天气网站也给出了数据的API接口。以下是API的地址。返回的数据格式为json格式。 1. http://www.weather.com.cn/data/sk/101010100.html 2. http://www.weather.com.cn/data/cityinfo/101010100.html 3. http://m.weather.com.cn/data/101010100.html URL中的数字”101010100“是城市代码。所以可以先列出每个城市的城市代码,然后php程序接收到了城市代码,再去组装URL,在通过URL来显示该城市的实时天气。 index.php 复制代码 代码如下: <?php header("Content-Type:text/html;charset=utf-8"); ?> <html> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <head> <title>weather forecast</title> <script type="text/javascript" src="ajax.js"></script> <script type="text/javascript"> function $(id){ return document.getElementById(id); } function getCityId(){ var http_request=createAjax(); var url="weatherforecast.php" var data="cityid="+$("cityId").value; http_request.onreadystatechange=getWetherInfo; http_request.open("post",url,true); http_request.setRequestHeader("Content-type","application/x-www-form-urlencoded"); http_request.send(data); function getWetherInfo(){ if(http_request.readyState==4 && http_request.status==200){ var info=http_request.responseText; $("weatherinfo").innerHTML=info; } } } </script> </head> <body> <select name="cityId" onchange="getCityId();" id="cityId"> <option>--请选择城市--</option> <option value="101010100">北京</option> <option value="101020100">上海</option> <option value="101030100">天津</option> <option value="101040100">重庆</option> <option value="101280101">广州</option> </select> <span id="weatherinfo"></span> </body> </html> weatherforecast.php 复制代码 代码如下: <?php header("Content-Type:text/html;charset=utf-8"); header("Cache-Control:no-cache"); if (isset($_POST['cityid'])){ $cityid=$_POST['cityid']; $url=$url="http://www.weather.com.cn/data/sk/".$cityid.".html"; }else { $url="http://www.weather.com.cn/data/sk/101010100.html"; } $weatherInfo_json=file_get_contents($url); $weatherInfo=json_decode($weatherInfo_json,true); $cityName=$weatherInfo['weatherinfo']['city']; $cityTemp=$weatherInfo['weatherinfo']['temp']; $cityWd=$weatherInfo['weatherinfo']['WD']; $cityWs=$weatherInfo['weatherinfo']['WS']; $cityTime=$weatherInfo['weatherinfo']['time']; $citySD=$weatherInfo['weatherinfo']['SD']; echo $weatherinfo="城市名字:$cityName,气温:$cityTemp,风向:$cityWd"; ?> |
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