Feature: #94499 - Implement AddPageTypeZeroSource event listener

See forge#94499


A new event listener for \TYPO3\CMS\Redirects\Event\SlugRedirectChangeItemCreatedEvent is introduced, which creates a \TYPO3\CMS\Redirects\RedirectUpdate\PageTypeSource for a page before the slug has been changed. The full URI is built to fill the source_host and source_path, which takes configured RouteEnhancers and RouteDecorators into account, for example, the PageType route decorator.

It is not possible to configure page types for which sources should be added. If you need to do so, read additional PageTypeSource auto-create redirect source type which provides an example of how to implement custom event listeners based on PageTypeSource.

If PageTypeSource for page type 0 results in a different source, the PlainSlugReplacementSource is not removed to keep the original behaviour, which some instances may rely on.

This behaviour can be modified by adding an event listener for SlugRedirectChangeItemCreatedEvent

Remove plain slug source if page type 0 differs:

Registration of the event in your extension's Services.yaml:

    - name: event.listener
      identifier: 'my-extension/custom-page-type-redirect'
      # Registering after core listener is important, otherwise we would
      # not know if there is a PageType source for page type 0
      after: 'redirects-add-page-type-zero-source'

The corresponding event listener class:

namespace MyVendor\MyExtension\Redirects;

use TYPO3\CMS\Redirects\Event\SlugRedirectChangeItemCreatedEvent;
use TYPO3\CMS\Redirects\RedirectUpdate\PageTypeSource;
use TYPO3\CMS\Redirects\RedirectUpdate\PlainSlugReplacementRedirectSource;
use TYPO3\CMS\Redirects\RedirectUpdate\RedirectSourceCollection;
use TYPO3\CMS\Redirects\RedirectUpdate\RedirectSourceInterface;

final class MyEventListener
    public function __invoke(
        SlugRedirectChangeItemCreatedEvent $event
    ): void {
        $changeItem = $event->getSlugRedirectChangeItem();
        $sources = $changeItem->getSourcesCollection()->all();
        $pageTypeZeroSource = $this->getPageTypeZeroSource(
        if ($pageTypeZeroSource === null) {
            // nothing we can do - no page type 0 source found

        // Remove plain slug replacement redirect source from sources. We
        // already know, that if it is there it differs from the page type
        // 0 source, therefor it is safe to simply remove it by class check.
        $sources = array_filter(
            static fn ($source) => !($source instanceof PlainSlugReplacementRedirectSource)

        // update sources
        $changeItem = $changeItem->withSourcesCollection(
            new RedirectSourceCollection(

        // update change item with updated sources

    private function getPageTypeZeroSource(
        RedirectSourceInterface ...$sources
    ): ?PageTypeSource {
        foreach ($sources as $source) {
            if ($source instanceof PageTypeSource
                && $source->getPageType() === 0
            ) {
               return $source;
        return null;


An additional redirect source is automatically added if a PageType suffix is configured in the SiteConfiguration for page type 0. In that case two redirects are created, one for the plain slug change and one with the suffix in the source_path. That way it does not break instances relying on the fact that plain slug based redirects are created.