PHP 使用CURL隐藏真实客户端IP

<?php
error_reporting(0);

function GetIP(){
if($_SERVER['HTTP_CLIENT_IP']){
  $onlineip=$_SERVER['HTTP_CLIENT_IP'];
  }elseif($_SERVER['HTTP_X_FORWARDED_FOR']){
  $onlineip=$_SERVER['HTTP_X_FORWARDED_FOR'];
  }else{
  $onlineip=$_SERVER['REMOTE_ADDR'];
  }
return $onlineip;
}

?>

<?php

error_reporting(0);

require 'ip.php';
  
echo '<hr>'.'Your IP is '.GetIP().'<br>'.'<hr>';

/*echo 'REMOTE_ADDR is '.$_SERVER['REMOTE_ADDR'].'<br>';
echo 'HTTP_CLIENT_IP is  '.$_SERVER['HTTP_CLIENT_IP'].'<br>';
echo 'HTTP_X_FORWARDED_FOR is '.$_SERVER['HTTP_X_FORWARDED_FOR'].'<br>';
echo 'HTTP_VIA is '.$_SERVER['HTTP_VIA'];*/

?>

<?php

error_reporting(0);

function curl_string ($url,$user_agent,$proxy){
$ch = curl_init();
curl_setopt ($ch, CURLOPT_PROXY, $proxy);
curl_setopt ($ch, CURLOPT_URL, $url);
curl_setopt ($ch, CURLOPT_USERAGENT, $user_agent);
curl_setopt ($ch, CURLOPT_COOKIEJAR, "d:\cookies.txt");
curl_setopt ($ch, CURLOPT_HEADER, 1);
curl_setopt ($ch, CURLOPT_HTTPHEADER, array('CLIENT-IP:125.210.188.36', 'X-FORWARDED-FOR:125.210.188.36'));  //此处可以改为任意假IP
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt ($ch, CURLOPT_TIMEOUT, 120);

$result = curl_exec ($ch);
curl_close($ch);
return $result;
}
$url_page = "http://s4nd.no-ip.org/test/index.php";
$user_agent = "Mozilla/4.0";
$proxy = "http://125.210.188.36:80";    //此处为代理服务器IP和PORT

$string = curl_string($url_page,$user_agent,$proxy);

echo $string;

?>