根据IP获取天气状况

最新推荐文章于 2025-06-28 16:41:05 发布

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#php #IP #天气

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上一节我们学习了如何获取客户端IP，并确定其所在地。这一节我们接着学习根据已获取的信息进一步获取客户所在地的天气情况。

根据上一节里我们已经获取了的客户所在的省份、城市，那么我们只要利用一些与天气相关的网站的API，就能完成天气情况的信息获取（此处使用的是中国天气网所提供的API）。

我们还是先来看看代码怎么实现的：

<?php
header('Content-Type:text/html;Charset=utf-8');
function GetIp(){
    $realip = '';
    $unknown = 'unknown';
    if (isset($_SERVER)){
        if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && !empty($_SERVER['HTTP_X_FORWARDED_FOR']) && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown)){
            $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
            foreach($arr as $ip){
                $ip = trim($ip);
                if ($ip != 'unknown'){
                    $realip = $ip;
                    break;
                }
            }
        }else if(isset($_SERVER['HTTP_CLIENT_IP']) && !empty($_SERVER['HTTP_CLIENT_IP']) && strcasecmp($_SERVER['HTTP_CLIENT_IP'], $unknown)){
            $realip = $_SERVER['HTTP_CLIENT_IP'];
        }else if(isset($_SERVER['REMOTE_ADDR']) && !empty($_SERVER['REMOTE_ADDR']) && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown)){
            $realip = $_SERVER['REMOTE_ADDR'];
        }else{
            $realip = $unknown;
        }
    }else{
        if(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), $unknown)){
            $realip = getenv("HTTP_X_FORWARDED_FOR");
        }else if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), $unknown)){
            $realip = getenv("HTTP_CLIENT_IP");
        }else if(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), $unknown)){
            $realip = getenv("REMOTE_ADDR");
        }else{
            $realip = $unknown;
        }
    }
    $realip = preg_match("/[\d\.]{7,15}/", $realip, $matches) ? $matches[0] : $unknown;
    return $realip;
}

function GetIpLookup($ip = ''){
    if(empty($ip)){
        $ip = GetIp();
    }
    $address = @file_get_contents('http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=' . $ip);
    if(empty($address)){ return false; }
    $jsonMatches = array();
    preg_match('#\{.+?\}#', $address, $jsonMatches);
    if(!isset($jsonMatches[0])){ return false; }
    $address_json = json_decode($jsonMatches[0], true);
    if(isset($address_json['ret']) && $address_json['ret'] == 1){
        $address_json['ip'] = $ip;
        unset($address_json['ret']);
    }else{
        return false;
    }
    return $address_json;
}

$ipInfos = GetIpLookup();
//var_dump($ipInfos);
//echo "<br>";
echo "IP所在地： " .$ipInfos ["country"].$ipInfos ["province"].$ipInfos ["city"]. "<br>";

//获取省级代码
$get_province_url = "http://www.weather.com.cn/data/list3/city.xml?level=1";
$all_province_info = file_get_contents($get_province_url);
//echo $all_province_info."<br>";
//切割为数组
$all_province_arr = explode(',', $all_province_info);
//var_dump($all_province_arr);
//echo"<br>";
$city_code;
foreach($all_province_arr as $key => $row){
    $temp = explode('|', $row);
    if($ipInfos ["province"] == $temp[1]){
        $city_code = $temp[0];
    }
}
//echo $city_code."<br>";
//获取城市代码
$all_city_info = file_get_contents("http://www.weather.com.cn/data/list3/city".$city_code.".xml?level=2");
$all_city_arr = explode(',', $all_city_info);
foreach($all_city_arr as $key => $row){
    $temp = explode('|', $row);
    if($ipInfos ["city"] == $temp[1]){
        $city_code = $temp[0];
    }
}
//echo $city_code."<br>";
//获取区域代码
$all_county_info = file_get_contents("http://www.weather.com.cn/data/list3/city".$city_code.".xml?level=2");
$all_county_arr = explode(',', $all_county_info);
$county_arr = explode('|', $all_county_arr[0]);
$city_code = $county_arr[0];
//echo $city_code."<br>";
//获取天气
$url = "http://www.weather.com.cn/data/cityinfo/101".$city_code.".html";
$weather_info = file_get_contents($url);
//var_dump($weather_info);
//echo "<br>";
$str = substr($weather_info,0,-5);
//var_dump($str);
//echo "<br>";
$weather_arr = json_decode($str);
//var_dump($weather_arr);

echo "气温： " .$weather_arr->weatherinfo->temp2."到".$weather_arr->weatherinfo->temp1."<br>"."天气： ".$weather_arr->weatherinfo->weather. "<br>";
?>

运行结果如下：

需要注意的地方有：

1、使用中国天气网提供的API之前，需要做的工作时获取所在地的省份代码、城市代码和区域代码。

2、获取省份代码时，返回的字符串格式为

01|北京,02|上海,03|天津,04|重庆,05|黑龙江,06|吉林,07|辽宁,08|内蒙古,09|河北,10|山西,11|陕西,12|山东,13|新疆,14|西藏,15|青海,16|甘肃,17|宁夏,18|河南,19|江苏,20|湖北,21|浙江,22|安徽,23|福建,24|江西,25|湖南,26|贵州,27|四川,28|广东,29|云南,30|广西,31|海南,32|香港,33|澳门,34|台湾

需要用explode() 函数把字符串分割为数组：

array(34) { [0]=> string(9) "01|北京" [1]=> string(9) "02|上海" [2]=> string(9) "03|天津" [3]=> string(9) "04|重庆" [4]=> string(12) "05|黑龙江" [5]=> string(9) "06|吉林" [6]=> string(9) "07|辽宁" [7]=> string(12) "08|内蒙古" [8]=> string(9) "09|河北" [9]=> string(9) "10|山西" [10]=> string(9) "11|陕西" [11]=> string(9) "12|山东" [12]=> string(9) "13|新疆" [13]=> string(9) "14|西藏" [14]=> string(9) "15|青海" [15]=> string(9) "16|甘肃" [16]=> string(9) "17|宁夏" [17]=> string(9) "18|河南" [18]=> string(9) "19|江苏" [19]=> string(9) "20|湖北" [20]=> string(9) "21|浙江" [21]=> string(9) "22|安徽" [22]=> string(9) "23|福建" [23]=> string(9) "24|江西" [24]=> string(9) "25|湖南" [25]=> string(9) "26|贵州" [26]=> string(9) "27|四川" [27]=> string(9) "28|广东" [28]=> string(9) "29|云南" [29]=> string(9) "30|广西" [30]=> string(9) "31|海南" [31]=> string(9) "32|香港" [32]=> string(9) "33|澳门" [33]=> string(9) "34|台湾" }

3、返回天气信息json格式不对：

string(164) "{"weatherinfo":{"city":"成都","cityid":"101270101","temp1":"21℃","temp2":"14℃","weather":"阴转小雨","img1":"d2.gif","img2":"n7.gif","ptime":"08:00"}}ml> "

后面多了几个不必要的字符，要进行字符串处理 substr($weather_info,0,-5)：

string(159) "{"weatherinfo":{"city":"成都","cityid":"101270101","temp1":"21℃","temp2":"14℃","weather":"阴转小雨","img1":"d2.gif","img2":"n7.gif","ptime":"08:00"}}"

最后对 JSON 格式的字符串进行编码：

object(stdClass)#13 (1) { ["weatherinfo"]=> object(stdClass)#14 (8) { ["city"]=> string(6) "成都" ["cityid"]=> string(9) "101270101" ["temp1"]=> string(5) "21℃" ["temp2"]=> string(5) "14℃" ["weather"]=> string(12) "阴转小雨" ["img1"]=> string(6) "d2.gif" ["img2"]=> string(6) "n7.gif" ["ptime"]=> string(5) "08:00" } }

本文工作都是由于个人兴趣，还存在一些地方需要改进，还请大家多多指正。

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