New in version 11.4

The PSR-14 event \TYPO3\CMS\Core\Core\Event\BootCompletedEvent is fired on every request when TYPO3 has been fully booted, right after all configuration files have been added.

This event complements the AfterTcaCompilationEvent which is executed after TCA configuration has been assembled.

Use cases for this event include running extension's code which needs to be executed at any time and needs TYPO3's full configuration including all loaded extensions.




namespace MyVendor\MyExtension\Bootstrap\EventListener;

use TYPO3\CMS\Core\Attribute\AsEventListener;
use TYPO3\CMS\Core\Core\Event\BootCompletedEvent;

    identifier: 'my-extension/boot-completed',
final readonly class MyEventListener
    public function __invoke(BootCompletedEvent $e): void
        // Do your magic

New in version 13.0

The PHP attribute \TYPO3\CMS\Core\Attribute\AsEventListener has been introduced to tag a PHP class as an event listener. Alternatively, or if you need to be compatible with older TYPO3 versions, you can also register an event listener via the Configuration/Services.yaml file. Switch to an older version of this page for an example or have a look at the section Implementing an event listener in your extension.


class BootCompletedEvent
Fully qualified name

Executed when TYPO3 has fully booted (after all ext_tables.php files have been processed)

isCachingEnabled ( )