How to get the city based on IP address in php

This article mainly shares with you how to obtain the city based on the IP address in PHP. This article is mainly in the form of code. I hope it can help everyone.

<?php
header(&#39;Content-Type:text/html;Charset=utf-8&#39;);
function GetIp(){
    $realip = &#39;&#39;;
    $unknown = &#39;unknown&#39;;
    if (isset($_SERVER)){
        if(isset($_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;]) && !empty($_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;]) && strcasecmp($_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;], $unknown)){
            $arr = explode(&#39;,&#39;, $_SERVER[&#39;HTTP_X_FORWARDED_FOR&#39;]);
            foreach($arr as $ip){
                $ip = trim($ip);
                if ($ip != &#39;unknown&#39;){
                    $realip = $ip;
                    break;
                }
            }
        }else if(isset($_SERVER[&#39;HTTP_CLIENT_IP&#39;]) && !empty($_SERVER[&#39;HTTP_CLIENT_IP&#39;]) && strcasecmp($_SERVER[&#39;HTTP_CLIENT_IP&#39;], $unknown)){
            $realip = $_SERVER[&#39;HTTP_CLIENT_IP&#39;];
        }else if(isset($_SERVER[&#39;REMOTE_ADDR&#39;]) && !empty($_SERVER[&#39;REMOTE_ADDR&#39;]) && strcasecmp($_SERVER[&#39;REMOTE_ADDR&#39;], $unknown)){
            $realip = $_SERVER[&#39;REMOTE_ADDR&#39;];
        }else{
            $realip = $unknown;
        }
    }else{
        if(getenv(&#39;HTTP_X_FORWARDED_FOR&#39;) && strcasecmp(getenv(&#39;HTTP_X_FORWARDED_FOR&#39;), $unknown)){
            $realip = getenv("HTTP_X_FORWARDED_FOR");
        }else if(getenv(&#39;HTTP_CLIENT_IP&#39;) && strcasecmp(getenv(&#39;HTTP_CLIENT_IP&#39;), $unknown)){
            $realip = getenv("HTTP_CLIENT_IP");
        }else if(getenv(&#39;REMOTE_ADDR&#39;) && strcasecmp(getenv(&#39;REMOTE_ADDR&#39;), $unknown)){
            $realip = getenv("REMOTE_ADDR");
        }else{
            $realip = $unknown;
        }
    }
    $realip = preg_match("/[\d\.]{7,15}/", $realip, $matches) ? $matches[0] : $unknown;
    return $realip;
}

function GetIpLookup($ip = &#39;&#39;){
    if(empty($ip)){
        $ip = GetIp();
    }
    $res = @file_get_contents(&#39;http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=&#39; . $ip);
    if(empty($res)){ return false; }
    $jsonMatches = array();
    preg_match(&#39;#\{.+?\}#&#39;, $res, $jsonMatches);
    if(!isset($jsonMatches[0])){ return false; }
    $json = json_decode($jsonMatches[0], true);
    if(isset($json[&#39;ret&#39;]) && $json[&#39;ret&#39;] == 1){
        $json[&#39;ip&#39;] = $ip;
        unset($json[&#39;ret&#39;]);
    }else{
        return false;
    }
    return $json;
}


$ipInfos = GetIpLookup(&#39;123.125.114.144&#39;); //baidu.com IP鍦板潃
var_dump($ipInfos);
?>

Related recommendations:

PHP obtains the specific implementation of the city based on the IP address_PHP tutorial

The above is the detailed content of How to get the city based on IP address in php. For more information, please follow other related articles on the PHP Chinese website!