PHP curl forged IP address and header information code example

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 of all, the code

Copy the codeThe 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 ($ch, CURLOPT_URL, "http://localhost/curl/");
curl_setopt ($ch, CURLOPT_HTTPHEADER , $headerArr ); //Construct IP
curl_setopt ($ch, CURLOPT_REFERER, "http:/// ");   //Construction origin

curl_setopt( $ch, CURLOPT_HEADER, 1);

curl_exec($ch);

curl_close ($ch);

$out = ob_get_contents();

ob_clean();

echo $out;

Then

Copy the codeThe 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 "<br>Access IP: ".GetIP()."<br>";
echo "<br>Access: ".$_SERVER["HTTP_REFERER"];