PHP开发小技巧之根据ip地址获取城市

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Lepaskan： 2023-03-23 17:46:01

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3052 orang telah melayarinya

本篇文章给大家分享的内容是PHP开发小技巧之根据ip地址获取城市，有着一定的参考价值，有需要的朋友可以参考一下

这个方法我们用的还是比较多的，便于收集信息用于数据挖掘分析。此方法不光根据ip地址进行获取当前城市还可以根据http请求获取用户的城市位置。

实现方法：主要是根据高德地图API进行获取，首先注册成为高德地图用户，然后认证成为开发者，创建应用获取key进行调用即可。具体实现方法如下：

<?php

/**
 * =======================================
 * Created by ZHIHUA·WEI.
 * Author: ZHIHUA·WEI
 * Date: 2018/4/12
 * Time: 16:13
 * Project: PHP开发小技巧
 * Power: 根据ip地址获取城市
 * =======================================
 */

/**
 * 根据HTTP请求获取用户位置
 */
function get_user_location()
{
    $key = "4a218d0d82c3a74acf019b701e8c0ccc"; // 高德地图key
    $url = "http://restapi.amap.com/v3/ip?key=$key";
    $json = file_get_contents($url);
    $obj = json_decode($json, true); // 转换数组
    $obj["message"] = $obj["status"] == 0 ? "失败" : "成功";
    return $obj;
}

/**
 * 根据 ip 获取 当前城市
 */
function get_city_by_ip()
{
    if (!empty($_SERVER["HTTP_CLIENT_IP"])) {
        $cip = $_SERVER["HTTP_CLIENT_IP"];
    } elseif (!empty($_SERVER["HTTP_X_FORWARDED_FOR"])) {
        $cip = $_SERVER["HTTP_X_FORWARDED_FOR"];
    } elseif (!empty($_SERVER["REMOTE_ADDR"])) {
        $cip = $_SERVER["REMOTE_ADDR"];
    } else {
        $cip = "";
    }
    $url = &#39;https://restapi.amap.com/v3/ip&#39;;
    $data = array(
        &#39;output&#39; => &#39;json&#39;,
        &#39;key&#39; => &#39;4a218d0d82c3a74acf019b701e8c0ccc&#39;,
        &#39;ip&#39; => $cip
    );

    $postdata = http_build_query($data);
    $opts = array(
        &#39;http&#39; => array(
            &#39;method&#39; => &#39;POST&#39;,
            &#39;header&#39; => &#39;Content-type: application/x-www-form-urlencoded&#39;,
            &#39;content&#39; => $postdata
        )
    );

    $context = stream_context_create($opts);

    $result = file_get_contents($url, false, $context);
    if (!empty($result)) {
        $res = json_decode($result, true);
        if (!empty($res)) {

            if (count($res[&#39;province&#39;]) == 0) {
                $res[&#39;province&#39;] = &#39;北京市&#39;;
            }
            if (!empty($res[&#39;province&#39;]) && $res[&#39;province&#39;] == "局域网") {
                $res[&#39;province&#39;] = &#39;北京市&#39;;
            }
            if (count($res[&#39;city&#39;]) == 0) {
                $res[&#39;city&#39;] = &#39;北京市&#39;;
            }
        } else {
            $res[&#39;province&#39;] = &#39;北京市&#39;;
            $res[&#39;city&#39;] = &#39;北京市&#39;;
        }

        return $res;
    } else {
        return array(
            "province" => &#39;北京市&#39;,
            "city" => &#39;北京市&#39;
        );
    }
}

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