get IP

get-ip.php

<?php

function get_ip() {

	$ip = '127.0.0.1';

	if ( ! empty( $_SERVER['HTTP_CLIENT_IP'] ) ) {
		$ip = $_SERVER['HTTP_CLIENT_IP'];
	} elseif ( ! empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
		$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
	} elseif ( ! empty( $_SERVER['REMOTE_ADDR'] ) ) {
		$ip = $_SERVER['REMOTE_ADDR'];
	}

	// Fix potential CSV returned from $_SERVER variables
	$ip_array = array_map( 'trim', explode( ',', $ip ) );

	return $ip_array[0];
}