init.php

<?php

/**
 * This file is part of ILIAS, a powerful learning management system
 * published by ILIAS open source e-Learning e.V.
 *
 * ILIAS is licensed with the GPL-3.0,
 * see https://www.gnu.org/licenses/gpl-3.0.en.html
 * You should have received a copy of said license along with the
 * source code, too.
 *
 * If this is not the case or you just want to try ILIAS, you'll find
 * us at:
 * https://www.ilias.de
 * https://github.com/ILIAS-eLearning
 *
 *********************************************************************/

class FileUpload implements Component
{
    /** ... **/
    public function init($c) {
        $local = new DI\Container();

        $c["upload"] = fn ($c) => new \ILIAS\FileUpload\FileUploadImpl(
            $local["processor-manager"],
            $c["filesystem"],
            $c["http"]
        );

        $local["preprocessor.virusscanner"] = fn ($local) => new VirusScannerPreProcessor($c["virusscanner"]);


        $local["processor-manager"] = fn ($local) => new PreProcessorManagerImpl();

        /** ... **/
    
    }
    /** ... **/
}


/** INITIALISATION THEN JUST IS: **/

$DIC = new DI\Container();
foreach ($components as $c) {
    $c->init($DIC);
}