index.php

<?php

require __DIR__ . '/vendor/autoload.php';

use Symfony\Component\HttpFoundation\Request;
use Doctrine\DBAL\Configuration;
use Doctrine\DBAL\DriverManager;

/*
use Monolog\Logger;
use Monolog\Handler\StreamHandler;

// create a log channel
$log = new Logger('name');
$log->pushHandler(new StreamHandler('logs/log.log', Logger::WARNING));

// add records to the log
$log->addWarning('Foo');
$log->addError('Bar');
*/

// Handle request
$request = Request::createFromGlobals();

// Connection to DB
$config = new Configuration();
$connectionParams = array(
    'dbname' => 'db',
    'user' => 'root',
    'password' => 'usbw',
    'host' => 'localhost',
    'port' => 3307,
    'driver' => 'pdo_mysql',
);
$conn = DriverManager::getConnection($connectionParams, $config);

function path($path = '')
{
	global $request;

	return $request->server->get('SCRIPT_NAME') . $path;
}
function url($path = '')
{
	global $request;

	return $request->getSchemeAndHttpHost() . path($path);
}

switch ($request->server->get('PATH_INFO')) {
	case '':
		if ($request->query->getInt('id')) {
		    require_once 'post.php';
		} else {
		    require_once 'posts.php';
		}

		break;
	case '/admin/post':
		if ($request->query->getInt('id')) {
		    require_once 'admin-post.php';
		} else {
			require_once 'admin-posts.php';
		}

		break;
	case '/admin/post/new':
		require_once 'admin-post.php';
		break;
	case '/admin/post/delete':
		$conn->delete('posts', [
			'id' => $request->query->getInt('id'),
		]);
		header('Location: ' . path('/admin/post'));
		exit;
		break;
	default:
		header('HTTP/1.0 404 Not Found');
		require '404.php';
}