Get IP Address

ip_address.php

<?php
	function get_ip() {
		foreach ( array( 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_X_CLUSTER_CLIENT_IP', 'HTTP_FORWARDED_FOR', 'HTTP_FORWARDED', 'REMOTE_ADDR' ) as $key ) {
			if ( array_key_exists( $key, $_SERVER ) === true ) {
				foreach ( explode( ',', $_SERVER[$key] ) as $ip ) {
					$ip = trim( $ip );
					if ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) !== false ) {
						return $ip;
					}
				}
			}
		}
	}
?>

I'm look it too: https://rtcamp.com/tutorials/nginx/forwarding-visitors-real-ip/

Maybe I need make it.