adlerka.space/lib/routing.php

<?php

function getProtocol(){
    if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && !empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
        return "https://";
    } else {
        return "http://";
    }
}

function getPage($routerConfig){
    $default_page = "domov";

    $default_site = "home";

    $template_dir = "templates/";

    $static_page_dir = "pages/";

    $dynamic_page_dir = "dynamic/";

    $subdomain = basename(explode('.', $_SERVER['HTTP_HOST'])[0]);
    $domain = basename(explode('.', $_SERVER['HTTP_HOST'])[1]);
    $tld = basename(explode('.', $_SERVER['HTTP_HOST'])[2]);
    $page_name = basename($_SERVER["QUERY_STRING"]);
    $protocol = getProtocol();

    if (empty($tld)){
        header("Location: $protocol$default_site.$subdomain.$domain/$default_page");
        return;
    }

    if (empty($page_name)){
        header("Location: $protocol$subdomain.$domain.$tld/$default_page");
        return;
    }
    $page_dir = "pages/";

    $dynamic_page_file = $page_dir . $subdomain . "/" . $page_name . ".php";
    $page_file = $page_dir . $subdomain . "/" . $page_name . ".html";

    $dynamic_page_file_global = $page_dir . "global/" . $page_name . ".php";
    $page_file_global = $page_dir . "global/" . $page_name . ".html";

    $skeleton = file_get_contents($template_dir . "skeleton.html");
    $nav = file_get_contents($template_dir . "nav.html");

    if (file_exists($dynamic_page_file_global)){
        $page = include_once $dynamic_page_file_global;
    }
    elseif (file_exists($page_file_global)){
        $page = file_get_contents($page_file_global);
    }
    elseif (file_exists($dynamic_page_file)){
        $page = include_once $dynamic_page_file;
    }
    elseif (file_exists($page_file)){
        $page = file_get_contents($page_file);
    }
    else{
        $page = file_get_contents($template_dir . "404.html");
    }
    $navpages = generateNavigation($static_page_dir, $protocol, $subdomain, $domain, $tld, $default_page, $page_name);

    $nav = str_replace("__NAV_PAGES__", $navpages, $nav);

    $out = $skeleton;
    $out = str_replace("__TEMPLATE__NAV__", $nav, $out);
    $out = str_replace("__TEMPLATE__PAGE__", $page, $out);
    $out = str_replace("__TEMPLATE_PAGE_NAME__", $page_name, $out);
    return $out;
}

?>