PHP curl fake IP address and header information code example_PHP tutorial

PHP curl forged IP address and header information code example

This article mainly introduces PHP curl forged IP address and header information code example. This article gives the server and client Implementation code, providing forgery function and server-side detection code, friends in need can refer to it

Although curl is powerful, it can only forge $_SERVER["HTTP_X_FORWARDED_FOR"]. For most IP address detection programs, $_SERVER["REMOTE_ADDR"] is difficult to forge:

First is the code of client.php

The code is as follows:

$headers['CLIENT-IP'] = '202.103.229.40';

$headers['X-FORWARDED-FOR'] = '202.103.229.40';

　$headerArr = array();

foreach( $headers as $n => $v ) {

　$headerArr[] = $n .':' . $v;

　}

ob_start();

$ch = curl_init();

curl_setopt ($ch, CURLOPT_URL, "http://localhost/curl/server.php");

curl_setopt ($ch, CURLOPT_HTTPHEADER , $headerArr ); //Construct IP

curl_setopt ($ch, CURLOPT_REFERER, "http://www.163.com/ "); //Construction origin

curl_setopt( $ch, CURLOPT_HEADER, 1);

curl_exec($ch);

curl_close ($ch);

　$out = ob_get_contents();

ob_clean();

echo $out;

Then server.php

The code is as follows:

Function GetIP(){

　if(!emptyempty($_SERVER["HTTP_CLIENT_IP"]))

　$cip = $_SERVER["HTTP_CLIENT_IP"];

else if(!emptyempty($_SERVER["HTTP_X_FORWARDED_FOR"]))

$cip = $_SERVER["HTTP_X_FORWARDED_FOR"];

else if(!emptyempty($_SERVER["REMOTE_ADDR"]))

$cip = $_SERVER["REMOTE_ADDR"];

else

　$cip = "Unable to obtain!";

return $cip;

　}

echo "
Access IP: ".GetIP()."
";

echo "
Access source: ".$_SERVER["HTTP_REFERER"];

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