This tutorial will show you how we you can get Country, City, State information from an IP address using PHP. Sometimes we are curious to know the details about a user who has been visiting the web page, then we can use this kind of application to log the visitor’s details into database.
In this tutorial I am passing the IP to an external URL which will actually fetch the information and I will extract the detail information from response HTML.
Prerequisites
PHP 5.4
MySQL 5.5
Apace http Server 2.4
Netbeans 7.4 (Optional)
Step 1. Creates a php projects using Netbeans or create a project directory under htdocs.
Step 2. Create a php file called config.php with the below source code in the project directory
<?php
ini_set('display_errors', 'On');
error_reporting(E_ALL);
// setting up the web root and server root
$thisFile = str_replace('\\', '/', __FILE__);
$docRoot = $_SERVER['DOCUMENT_ROOT'];
$webRoot = str_replace(array($docRoot, 'config.php'), '', $thisFile);
$srvRoot = str_replace('config.php', '', $thisFile);
define('SRV_ROOT', $srvRoot);
require_once 'common.php';
/*
* End of file config.php
*/
Step 3. Create a common.php file with below source code in the project directory
<?php
//get city info from IP Adress
function get_country_city_from_ip($ip) {
//check, if the provided ip is valid
if (!filter_var($ip, FILTER_VALIDATE_IP)) {
throw new InvalidArgumentException("IP is not valid");
}
//contact ip-server
$response = @file_get_contents('http://www.netip.de/search?query=' . $ip);
if (empty($response)) {
//throw new InvalidArgumentException("Error contacting Geo-IP-Server");
return "error";
}
//Array containing all regex-patterns necessary to extract ip-geoinfo from page
$patterns = array();
$patterns["domain"] = '#Name: (.*?) #i';
$patterns["country"] = '#Country: (.*?) #i';
$patterns["state"] = '#State/Region: (.*?)<br#i';
$patterns["town"] = '#City: (.*?)<br#i';
//Array where results will be stored
$ipInfo = array();
//check response from ip server for above patterns
foreach ($patterns as $key => $pattern) {
//store the result in array
$ipInfo[$key] = preg_match($pattern, $response, $value) && !empty($value[1]) ? $value[1] : 'not found';
}
return $ipInfo;
}
/* End of file common.php */
Step 4. Create a PHP web page for displaying the Country information
<?php
require_once 'config.php';
$country_info = '';
if (isset($_POST['info'])) {
$ip = '223.223.149.111';
$country_info = get_country_city_from_ip($ip);
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form method="post" action="<?php echo htmlentities($_SERVER['PHP_SELF']); ?>">
<h3>Get Country Information</h3>
<div>
<input type="submit" name="info" value="Get Country Info"/>
</div>
</form>
<?php
if (isset($country_info) && !empty($country_info)) {
?>
<p>
Domain : <?php echo $country_info['domain']; ?>
</p>
<p>
Country : <?php echo $country_info['country']; ?>
</p>
<p>
State : <?php echo $country_info['state']; ?>
</p>
<p>
Town : <?php echo $country_info['town']; ?>
</p>
<?php
}
?>
</body>
</html>
That’s all. Thanks for reading.