PHP uses curl to forge IP source code

$ch = curl_init();
$url = "http://localhost/target_ip.php";
$header = array(
'CLIENT-IP:58.68.44.61',
 ' ;
$page_content = curl_exec($ch);
curl_close($ch);
echo $page_content;
?>


Copy code

echo getenv('REMOTE_ADDR');
?>


Copy code

Goal The IP printing order in the file target_ip is the current IP acquisition order of many open source systems. Visit fake_ip.php and see the results: 58.68.44.61 58.68.44.61 127.0.0.1 Finally, I’ll provide you with two small examples. example 1:

curl_setopt($ch, CURLOPT_HTTPHEADER, array(' X-FORWARDED-FOR:8.8.8.8', 'CLIENT-IP:8.8.8.8')); //Construct IP
curl_setopt($ch, CURLOPT_REFERER, "http://bbs.it-home.org/ ") ; //Construction source
curl_setopt($ch, CURLOPT_HEADER, 1);
$out = curl_exec($ch);
curl_close($ch);
?>


Copy code

Example 2:

$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"];
?>


Copy code