Get Users IP Address

A simple function to get your users ip address. Whether you want to log their ip address as part of their online activities, or authenticate/whitelist them by ip address, the following function will get you the ip address. It also grooms the ip address by removing anything that is not a number or a period. This function will return the forwarded-for address if it exists as well.

function get_user_ipaddress(){
 
	$ipaddress = (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR'] ;
 
	return ereg_replace('([^[:digit:]\.])','',$ipaddress);
 
}