PHP教程
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);
// 執行HTTP請求
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 .= "天氣：" . $v['weather'] ."\n";
 $contentStr .= "平均氣溫：" . $v['temp'] . "℃\n";
 $contentStr .= "最低氣溫：" . $v['l_tmp'] ."℃\n";
 $contentStr .= "最高氣溫：" . $v['h_tmp'] . "℃\n";
 $contentStr .= "風力：" . $v['WS'] . "\n";
 $contentStr .= "風向：" . $v['WD'] . "\n";
 $contentStr .= "日出時間：" . $v['sunrise'] . "\n";
 $contentStr .= "日落時間：" . $v['sunset'] . "\n";
 $contentStr .= "經度：" . $v['longitude'] . "\n";
 $contentStr .= "緯度：" . $v['latitude'];
 }
}
echo $contentStr;