Get real ip address

ip.php

<?php

function real_ip() {
  if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
    // Check IP from internet shared proxy
    $ip = $_SERVER['HTTP_CLIENT_IP'];
  } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    // Check IP from proxy
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
  } elseif (!empty($_SERVER['REMOTE_ADDR'])) {
    // Get IP from remote address
    $ip = $_SERVER['REMOTE_ADDR'];
  } else {
    // Suppose IP is localhost
    $ip = '127.0.0.1';
  }
  
  // If IP is an IPv6 address, extract the IPv4 address from it
  if (strpos($ip, '::') !== false) $ip = substr($ip, 0, strpos($ip, '::'));
  if (empty(trim($ip))) $ip = '127.0.0.1';
  
  return $ip;
}

// Example usage:

$ip = real_ip();
echo "Your real IP address is: $ip";