//百度天气接口API
$location = "北京";  //地区
$ak = "5slgyqGDENN7Sy7pw29IUvrZ"; //秘钥，需要申请，百度为了防止频繁请求
$weatherURL = "http://api.map.baidu.com/telematics/v3/weather?location=$location&output=json&ak=$ak";   
$ch = curl_init($weatherURL) ;
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // 获取数据返回
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true); // 在启用 CURLOPT_RETURNTRANSFER 时候将获取数据返回
$result = curl_exec($ch);
echo $result;