 
<?php 
$ch = curl_init(); 
$url = "http://localhost/target_ip.php"; 
$header = array( 
'CLIENT-IP:58.68.44.61', 
'X-FORWARDED-FOR:58.68.44.61', 
); 
curl_setopt($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_HTTPHEADER, $header); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER,true); 
$page_content = curl_exec($ch); 
curl_close($ch); 
echo $page_content; 
?> 

請求的目標文件target_ip.php:

復(fù)制代碼代碼如下:

 
<?php 
echo getenv('HTTP_CLIENT_IP'); 
echo getenv('HTTP_X_FORWARDED_FOR'); 
echo getenv('REMOTE_ADDR'); 
?> 

目標文件target_ip里面的IP打印順序是目前很多開源系統(tǒng)的IP獲取順序
訪問fake_ip.php,看到結(jié)果:
58.68.44.61
58.68.44.61
127.0.0.1
實例
CURL確實很強悍，可以偽造IP和來源。
1.php 請求 2.php 。

1.php代碼：

復(fù)制代碼代碼如下:

 
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, "http://localhost/2.php"); 
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:8.8.8.8', 'CLIENT-IP:8.8.8.8')); //構(gòu)造IP 
curl_setopt($ch, CURLOPT_REFERER, "http://chabaoo.cn/ "); //構(gòu)造來路 
curl_setopt($ch, CURLOPT_HEADER, 1); 
$out = curl_exec($ch); 
curl_close($ch); 

2.php代碼如下：

復(fù)制代碼代碼如下:

 
function getClientIp() { 
if (!empty($_SERVER["HTTP_CLIENT_IP"])) 
$ip = $_SERVER["HTTP_CLIENT_IP"]; 
else if (!empty($_SERVER["HTTP_X_FORWARDED_FOR"])) 
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"]; 
else if (!empty($_SERVER["REMOTE_ADDR"])) 
$ip = $_SERVER["REMOTE_ADDR"]; 
else 
$ip = "err"; 
return $ip; 
} 
echo "IP: " . getClientIp() . ""; 
echo "referer: " . $_SERVER["HTTP_REFERER"]; 

偽造成功，這是不是給“刷票”的朋友提供了很好的換IP的方案

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