index.php

<?php

/**
 * A simple PHP Login Script / ADVANCED VERSION
 * For more versions (one-file, minimal, framework-like) visit http://www.php-login.net
 *
 * @author Panique
 * @link http://www.php-login.net
 * @link https://github.com/panique/php-login-advanced/
 * @license http://opensource.org/licenses/MIT MIT License
 */

// check for minimum PHP version
if (version_compare(PHP_VERSION, '5.3.7', '<')) {
    echo PHP_VERSION;
    exit('Sorry, this script does not run on a PHP version smaller than 5.3.7 !');
} else if (version_compare(PHP_VERSION, '5.5.0', '<')) {
    // if you are using PHP 5.3 or PHP 5.4 you have to include the password_api_compatibility_library.php
    // (this library adds the PHP 5.5 password hashing functions to older versions of PHP)
    require_once('libraries/password_compatibility_library.php');
}

// include the config
require_once('config/config.php');

// include the to-be-used language, english by default. feel free to translate your project and include something else
require_once('translations/de.php');

// include the PHPMailer library
require_once('libraries/PHPMailer.php');

// load the login class
require_once('classes/Login.php');
require_once('classes/Registration.php');

// create a login object. when this object is created, it will do all login/logout stuff automatically
// so this single line handles the entire login process.

// load the login class
require_once('classes/General.php');
require_once('classes/Login.php');
require_once('classes/Registration.php');
require_once('classes/Email.php');

$general = new General();

// create a login object. when this object is created, it will do all login/logout stuff automatically
// so this single line handles the entire login process.
$login = new Login();
//TODO Login and Email don't work together because of header send issues. It might be better to generate the email object wihtin he other functions to avoid this
$email = new Email();
$registration = new Registration();

// ... ask if we are logged in here:
if ($login->isUserLoggedIn() == true) 
{
	include("views/index_in.php");
	#temporarly differentiation between normal users and testers/developers
	#$user_id = $_SESSION['user_id'];
	#$user_email = $_SESSION['user_email'];
	
	#$query = "SELECT * from mitgliederExt WHERE `user_id` LIKE '%$user_id%' AND `user_email` LIKE '%$user_email%' ";
	#$result = mysql_query($query) or die("Failed Query of " . $query. mysql_error());
	#$entry = mysql_fetch_array($result);
	
	#$test = $entry[test];
	
	#if ($test == ''){
	#	include("views/upgrade_in_temp.php");
	#}
	#elseif ($test == 1){
    #	include("views/index_in.php");
	#}
} 
else 
{
	
	/* redirect user according to browser language and geolocation:
if a user has browser language German or is located (IP-address)
 * in a German-speaking country (Germany, Austria, Switzerland or Liechtenstein)
 * then he will see the German site.
 * Otherwise he will be redirected to the English page in the en-folder. There will
 * be a link to the German page which sends a variable which is received here (GET)
 * to prevent the redirection to the English page again. */
 
if ($_GET['sprache'] != "de" || !isset($_GET['sprache'])) { //do not redirect if user clicked "Deutsch"-link on English page

$lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
//we only need the first two letters (so de-at is the same as de-ch etc.)

// and here comes the function to determine the country according to the ip-address
// see: https://stackoverflow.com/a/21880906
function ip_visitor_country()
{

    $client  = @$_SERVER['HTTP_CLIENT_IP'];
    $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
    $remote  = $_SERVER['REMOTE_ADDR'];
    $country  = "Unknown";

    if(filter_var($client, FILTER_VALIDATE_IP))
    {
        $ip = $client;
    }
    elseif(filter_var($forward, FILTER_VALIDATE_IP))
    {
        $ip = $forward;
    }
    else
    {
        $ip = $remote;
    }
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "http://www.geoplugin.net/json.gp?ip=".$ip);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    $ip_data_in = curl_exec($ch); // string
    curl_close($ch);

    $ip_data = json_decode($ip_data_in,true);
    $ip_data = str_replace('&quot;', '"', $ip_data); // for PHP 5.2 see stackoverflow.com/questions/3110487/

    if($ip_data && $ip_data['geoplugin_countryName'] != null) {
        $country = $ip_data['geoplugin_countryName'];
    }

    return $country;
}

/* redirect to english page if
 * 1. browser language is neither German nor English or
 * 2. browser language is English but location outside of german-speaking countries
 * else: show German page */

$gs_countries = array("Germany", "Austria", "Switzerland", "Liechtenstein"); //german-speaking countries 

if ((!in_array($lang, array("de", "en"))) || ($lang == "en" && (!in_array(ip_visitor_country(), $gs_countries)))) {
	header("location: en");
}

}
	
    include("views/index_not_in.php");
}
?>