code for IP echo service like ip.urls.is

index.php

<?php
  $http_client_ip = '';
  $http_x_forwarded_for = '';
  $remote_addr = $_SERVER['REMOTE_ADDR'] ?? '';
  $remote_host = '';
  $remote_port = $_SERVER['REMOTE_PORT'] ?? '';
  $remote_user = '';
  $redirect_remote_user = '';
  $http_user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '';

  if (isset($_SERVER['HTTP_CLIENT_IP']))
  {
    $http_client_ip = $_SERVER['HTTP_CLIENT_IP'];
  }

  if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
  {
    $http_x_forwarded_for = $_SERVER['HTTP_X_FORWARDED_FOR'];
  }

  if (isset($_SERVER['REMOTE_HOST']))
  {
    $remote_host = $_SERVER['REMOTE_HOST'];
  }

  if (isset($_SERVER['REMOTE_USER']))
  {
    $remote_user = $_SERVER['REMOTE_USER'];
    $remote_user = $_SERVER['REMOTE_USER'];
  }

  if (isset($_SERVER['REDIRECT_REMOTE_USER']))
  {
    $redirect_remote_user = $_SERVER['REDIRECT_REMOTE_USER'];
  }

  $api_url = 'http://api.hostip.info/get_html.php?ip='. $remote_addr .'&position=true';
  $response = @file($api_url);
  if ($response) {
    foreach ($response as $line) {
      $line = trim($line);
      if (!empty($line)) {
        // Fixed up this area of code using ChatGPT which helped us get rid of using a bunch of explodes() and now use lists instead.
        if (strpos($line, ': ') !== false) {
          list($key, $value) = explode(': ', $line);
          $array[$key] = $value;
        }
      }
    }

    $country = isset($array['Country']) ? $array['Country'] : '';
    $city = isset($array['City']) ? $array['City'] : '(Unknown city)';
    $location = $city .', '. $country;

    $lat = isset($array['Latitude']) && isset($array['Longitude']) ? $array['Latitude'] : '';
    $long = isset($array['Latitude']) && isset($array['Longitude']) ? $array['Longitude'] : '';
    $latlong = (empty($lat) && !empty($long)) ? $lat .','. $long : '';

    echo "HTTP_CLIENT_IP: ". $http_client_ip . "<br>";
    echo "HTTP_X_FORWARDED_FOR: ". $http_x_forwarded_for . "<br>";
    echo "REMOTE_ADDR: ". $remote_addr . "<br>";
    echo "HTTP_X_FORWARDED_FOR: ". $http_x_forwarded_for . "<br>";
    echo "REMOTE_ADDR: ". $remote_addr . "<br>";
    echo "REMOTE_HOST: ". $remote_host . "<br>";
    echo "REMOTE_PORT: ". $remote_port . "<br>";
    echo "REMOTE_USER: ". $remote_user . "<br>";
    echo "REDIRECT_REMOTE_USER: ". $redirect_remote_user . "<br>";
    echo "HTTP_USER_AGENT: ". $http_user_agent . "<br>";
    echo "LOCATION: ". $location . "<br>";
    echo "LAT/LONG: ". $latlong . "<br>";
  } else {
    echo "Unable to retrieve location information.";
  }
?>