<?php
// 获取ip

function ip()
{
 if (isset($_SERVER["HTTP_X_FORWARDED_FOR"]))
 $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
 else if (isset($_SERVER["HTTP_CLIENT_IP"]))
 $ip = $_SERVER["HTTP_CLIENT_IP"];
 else
 $ip = $_SERVER["REMOTE_ADDR"];

 return $ip;
}

$ip = ip();

// 通过百度apistore中api获取
// http://apistore.baidu.com/apiworks/servicedetail/114.html

 $ch = curl_init();
 $url = "http://apis.baidu.com/apistore/iplookupservice/iplookup?ip=$ip";
 $header = array(
 'apikey: 你的apikey',
 );
 // 添加apikey到header
 curl_setopt($ch, CURLOPT_HTTPHEADER , $header);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 // 执行HTTP请求
 curl_setopt($ch , CURLOPT_URL , $url);
 $res = curl_exec($ch);

 $arr = json_decode($res, true);

 echo "ip: " . $arr['retData']['ip'] . "<br/>";
 echo "address: " . $arr['retData']['country'] . "-" . $arr['retData']['province'] . "-" . $arr['retData']['city'] . "-" . $arr['retData']['district'] . "-" . $arr['retData']['carrier'];

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