what-is-my-ip.php

<link type="text/css" rel="stylesheet" href="css/style.css">

<!--	//returns first forwarded IP match it finds-->

<?php
	function forwarded_ip() {
		$keys = array(
			'HTTP_X_FORWARDED_FOR',
			'HTTP_X_FORWARDED',
			'HTTP_FORWARDED_FOR',
			'HTTP_FORWARDED',
			'HTTP_CLIENT_IP',
			'HTTP_X_CLUSTER_CLIENT-IP',
		);

		foreach($keys as $key) {
			if(isset($_SERVER[$key])) {
				$ip_array = explode(',', $_SERVER[$key]);
				foreach($ip_array as $ip) {
					$ip = trim($ip);
					if(validate_ip($ip)) {
						return $ip;
					}
				}
				}
			}
		return '';
		}


function validate_ip($ip) {
	if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) === false) {
		return false;
	} else {
		return true;
	}
}
$remote_ip = $_SERVER['REMOTE_ADDR'];
$forwarded_ip = forwarded_ip();
?>
<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<title>What is my IP</title>
	</head>
	<body>
		<div id="main-content">
			<h1>What Is My IP?</h1>
		<h3>The request came from:</h3>
		 <h2><?php echo($_SERVER['REMOTE_ADDR']); ?></h2>
			<br/>
		<br/>

		<?php if($forwarded_ip != '') {?>
			<h3> The request was forwarded for:</h3>
				<h2><?php echo $forwarded_ip; ?></h2>

		<?php } ?>
		</div>
	</body>
</html>