How can I get the IP address and port of a client with PHP?

问题

How do I get the IP and port of a client with PHP?

I tried the script below but it only gives me the IP address.

<?php print $_SERVER['REMOTE_ADDR']; ?>

回答1:

Port is defined in http server (Apache or other and mostly it is 80 or 443)

The PHP $_SERVER variables can be checked at this link.

I am sure that 'REMOTE_ADDR' returns the IP address from which the user is viewing the current page.

But if your server is behind NAT:

If you are serving from behind a proxy server, you will almost certainly save time by looking at what these $_SERVER variables do on your machine behind the proxy.

// in place of $_SERVER['REMOTE_ADDR']
$_SERVER['HTTP_X_FORWARDED_FOR']

//  in place of $_SERVER['SERVER_NAME']
$_SERVER['HTTP_X_FORWARDED_HOST'] && $_SERVER['HTTP_X_FORWARDED_SERVER']

回答2:

To get the port of the connected device you can use $_SERVER['REMOTE_PORT']

$ipAddress = $_SERVER['REMOTE_ADDR'];
$port      = $_SERVER['REMOTE_PORT'];

回答3:

Try this:

if (!isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $client_ip = $_SERVER['REMOTE_ADDR'];
}
else {
    $client_ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
}

来源：https://stackoverflow.com/questions/23251868/how-can-i-get-the-ip-address-and-port-of-a-client-with-php