<?php
// HEADERS FOR CACHE CONTROLL, ZIPPING ETC.
if(substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')){ob_start('ob_gzhandler');}else{ob_start();}
header('Cache-Control: no-cache, no-store, must-revalidate');
header('Content-Type: text/html; charset=UTF-8');
ini_set('default_charset', 'UTF-8');
date_default_timezone_set('Europe/Oslo');
// SET ERROR TO: NO ERROR
$error_code = 0;
$error_msg = NULL;
// REQUIRE NECESSARY FILES
require 'settings/database.php';
require 'settings/routing.php';
require 'settings/functions.php';
// START SECURE SESSION
startSession();
$check_session = checkSession();

if($routes[1] === "images" && (!preg_match('/[^0-9]/', $routes[2])) && !isset($routes[3])){
    http_response_code(200);
    $etag_file = 'forms/check_images.php';
    $etag_modify = filemtime($etag_file);
    $etag_header = md5_file($etag_file);
    header("Last-Modified: ".gmdate("D, d M Y H:i:s", $etag_modify)." GMT");
    header("Etag: $etag_header");
    // REQUIRE THE FILES
    require 'forms/check_images.php';
}else{
    $error_code = 3;
}