TYPO3 PageModule Enhancements

PageModuleEventListener.php

<?php

/*
 TYPO3 12+
 Registration in Services.yaml
 See https://docs.typo3.org/m/typo3/reference-coreapi/12.4/en-us/ApiOverview/Events/Events/Backend/ModifyPageLayoutContentEvent.html
 */

declare(strict_types=1);

namespace My\Extension\EventListener;

use TYPO3\CMS\Backend\Controller\Event\ModifyPageLayoutContentEvent;
use TYPO3\CMS\Backend\View\BackendLayoutView;
use TYPO3\CMS\Core\Utility\GeneralUtility;

final class PageModuleEventListener
{
    public function __invoke(ModifyPageLayoutContentEvent $event): void
    {
        // Get the current page ID
        $id = (int)($event->getRequest()->getQueryParams()['id'] ?? 0);

        $beLayout = GeneralUtility::makeInstance(BackendLayoutView::class)->getBackendLayoutForPage($id);
        $beLayoutTitle = $beLayout->getTitle();
        $beLayoutTitle = $GLOBALS['LANG']->sL($beLayoutTitle) ?? $beLayoutTitle;

        $event->addHeaderContent('<h3>Page info</h3><p><b>FE-Layout:</b> ' . $layoutTitle . '<br><b>BE-Layout:</b> ' . $beLayoutTitle . '</p>');
    }
}

PageModuleHook.php

<?php

/*
 TYPO3 10+11
 Registration in ext_localconf.php:
 $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/db_layout.php']['drawHeaderHook'][] = \My\Extension\Hooks\PageModuleHook::class . '->info';
 */

namespace My\Extension\Hooks;

use TYPO3\CMS\Backend\Controller\PageLayoutController;
use TYPO3\CMS\Backend\View\BackendLayoutView;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class PageModuleHook
{
    public function info(array $params, PageLayoutController $controller)
    {
        $beLayout = GeneralUtility::makeInstance(BackendLayoutView::class)->getBackendLayoutForPage($controller->id);
        $beLayoutTitle = $beLayout->getTitle();
        $beLayoutTitle = $GLOBALS['LANG']->sL($beLayoutTitle) ?? $beLayoutTitle;

        return '<h3>BE-Layout: ' . $beLayoutTitle . '</h3>';
    }
}