PHP Program to get client IP address

Program

<!DOCTYPE html>
<html>
<head>
<title>Display IP Address</title>
</head>
<body>
</body>
<?php
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
    $ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
    $ip = $_SERVER['REMOTE_ADDR'];
}
echo $ip;
?>
</html>

Output