高德天气API接口地址：https://developer.amap.com/api/webservice/guide/api/weatherinfo


function get_client_ip() {
    $ip = $_SERVER['REMOTE_ADDR'];
    if (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    } elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR']) AND preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
        foreach ($matches[0] AS $xip) {
            if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
                $ip = $xip;
                break;
            }
        }
    }
    return $ip;
}

function file_get_contents_by_curl($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$url);
    curl_setopt($ch, CURLOPT_HEADER,0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);//禁止调用时就输出获取到的数据
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
    $result = curl_exec($ch);
    curl_close($ch);return $result;
}

$clientip = get_client_ip();

$location = file_get_contents_by_curl('https://restapi.amap.com/v3/ip?ip='.$clientip.'&output=json&key=高德API的KEY');

$obj_location = json_decode($location);

// var_dump($location);
$province = $obj_location->province;
$cityname = $obj_location->city;
$citycode = $obj_location->adcode;



$weather = file_get_contents_by_curl('https://restapi.amap.com/v3/weather/weatherInfo?city='.$citycode.'&key=高德API的KEY&output=json&extensions=all');

$weather = json_decode($weather,true);
$weather = $weather['forecasts'][0]['casts'];//4天天气预报

foreach ($weather as $key => $value) {
    echo $value['date'].'<br>';
    echo $value['daytemp'].'<br>';
    echo $value['nighttemp'].'<br>';
}

var_dump($weather);
exit;