php

There are many ways, scripting/language to obtain remote IP address of the user who is browsing our website.

PERL

#!/usr/bin/perl
use CGI;
print "Content-type: text/plain; charset=iso-8859-1\n\n";
my $q = new CGI;
print "<b>Your Remote IP Address :" . $q->remote_host() . "</b>";

PHP

<?php
echo "<b>Your Remote IP Address :" . $_SERVER['REMOTE_ADDR'] . "</b>";
?>