Fat-Free Framework core library
First make sure to add a proper url rewrite configuration to your server, see https://fatfreeframework.com/3.6/routing-engine#DynamicWebSites
without composer:
$f3 = require('lib/base.php');
with composer:
composer require bcosca/fatfree-core
require("vendor/autoload.php");
$f3 = \Base::instance();
For the main repository (demo package), see https://github.com/bcosca/fatfree
For the test bench and unit tests, see https://github.com/bcosca/fatfree/tree/dev
For the user guide, see https://fatfreeframework.com/user-guide
For the documentation, see https://fatfreeframework.com/api-reference