main.php

<?php

require_once __DIR__.'/../framework/core/Core.php';

$request = new SS_HTTPRequest(
    $_SERVER['REQUEST_METHOD'],
    isset($_GET['url']) ? $_GET['url'] : '', 
    $_GET
);

$headers = Director::extract_request_headers($_SERVER);

foreach ($headers as $header => $value) {
    $request->addHeader($header, $value);
}

$container = Injector::inst();

$session = $container->create('Session', array());
if (Session::request_contains_session_id()) {
    $session->inst_start();
}

$container->get('RequestProcessor')->preRequest($request, $session, DataModel::inst());

require_once __DIR__.'/../framework/main.php';