Get IP

get_ip.php

<?php

/**
 * Function to return ip address
 *
 * @return string IP Address.
 */
function get_ip_address() {
	$ipaddress = '';
	if ( isset( $_SERVER['HTTP_CLIENT_IP'] ) ) {
		$ipaddress = $_SERVER['HTTP_CLIENT_IP'];
	} elseif ( isset( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
		$ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
	} elseif ( isset( $_SERVER['HTTP_X_FORWARDED'] ) ) {
		$ipaddress = $_SERVER['HTTP_X_FORWARDED'];
	} elseif ( isset( $_SERVER['HTTP_FORWARDED_FOR'] ) ) {
		$ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
	} elseif ( isset( $_SERVER['HTTP_FORWARDED'] ) ) {
		$ipaddress = $_SERVER['HTTP_FORWARDED'];
	} elseif ( isset( $_SERVER['REMOTE_ADDR'] ) ) {
		$ipaddress = $_SERVER['REMOTE_ADDR'];
	} else {
		$ipaddress = 'UNKNOWN';
	}
	return $ipaddress;
}