CoPilot

[dna]

Copilot is great...I mostly use it for programming. I once asked Copilot this question.

Can PHP use the IP address of a visitor to my web site to tell me the referring link?

And Copilot's answer:

Yes, PHP can use the IP address of a visitor to your website to tell you the referring link. You can use the $_SERVER['HTTP_REFERER'] variable to get the referring link. However, this method is not reliable as it can be easily spoofed by the user 123.

To get the real IP address of a visitor, you can use the $_SERVER['REMOTE_ADDR'] variable. However, this method is not foolproof either, as it can be masked by proxies or VPNs 14.

If you want to get the real IP address of a visitor even when they are using a proxy, you can use the following PHP code:

PHP

function getUserIP () {
if ( array_key_exists ('HTTP_X_FORWARDED_FOR', $_SERVER) && !empty ($_SERVER ['HTTP_X_FORWARDED_FOR']) ) {
if (strpos ($_SERVER ['HTTP_X_FORWARDED_FOR'], ',')>0) {
$addr = explode (",",$_SERVER ['HTTP_X_FORWARDED_FOR']);
return trim ($addr [0]);
} else {
return $_SERVER ['HTTP_X_FORWARDED_FOR'];
}
} else {
return $_SERVER ['REMOTE_ADDR'];
}
}

$user_ip = getUserIP ();
echo $user_ip; // Output IP address [Ex: 177.87.193.134]


https://stackoverflow.com/questions/13646690/how-to-get-real-ip-from-visitor

https://webmasters.stackexchange.co...isitors-ip-addresses-if-so-what-precautions-c

https://www.educative.io/answers/how-to-get-the-ip-address-of-visitors-on-your-php-powered-website

https://stackoverflow.com/questions/8687642/how-to-detect-the-visitors-ip-address-using-html