AfterLinkIsGeneratedEvent¶

New in version 12.0

This PSR-14 event supersedes the UrlProcessorInterface logic which allowed to modify mail URNs or external URLs, but not the full anchor tag.

In addition, this PSR-14 event also replaces the $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['typoLink_PostProc'] hook which was not executed at all times, and had a cumbersome API to modify values.

It is also recommended to use the PSR-14 event instead of the global getATagParams hook ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_content.php']['getATagParamsPostProc']) to add additional attributes (see example below) to links.

The PSR-14 event \TYPO3\CMS\Frontend\Event\AfterLinkIsGeneratedEvent allows PHP developers to modify any kind of link generated by TYPO3's mighty typolink() functionality.

By using this event, it is possible to add attributes to links to internal pages, or links to files, as the event contains the actual information of the link type with it.

As this event works with the \TYPO3\CMS\Frontend\Typolink\LinkResultInterface object it is possible to modify or replace the LinkResult information instead of working with string replacement functionality for adding, changing or removing attributes.

If a link could not be generated, a \TYPO3\CMS\Frontend\Typolink\UnableToLinkException might be thrown.

Example¶

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

EXT:my_extension/Configuration/Services.yaml

services:
  # Place here the default dependency injection configuration

  MyVendor\MyExtension\Frontend\EventListener\MyEventListener:
    tags:
      - name: event.listener
        identifier: 'my-extension/link-modifier'

Read how to configure dependency injection in extensions.

The corresponding event listener class:

EXT:my_extension/Classes/Frontend/EventListener/MyEventListener.php

<?php

declare(strict_types=1);

namespace MyVendor\MyExtension\Frontend\EventListener;

use TYPO3\CMS\Frontend\Event\AfterLinkIsGeneratedEvent;

final class MyEventListener
{
    public function __invoke(AfterLinkIsGeneratedEvent $event): void
    {
        $linkResult = $event->getLinkResult()->withAttribute(
            'data-enable-lightbox',
            'true',
        );
        $event->setLinkResult($linkResult);
    }
}

API¶

class \TYPO3\CMS\Frontend\Event\ AfterLinkIsGeneratedEvent¶

Generic event to modify any kind of link generation with typolink(). This is processed by all frontend-related links.

If a link could not be generated, a "UnableToLinkException" could be thrown by an Event Listener.

setLinkResult ( TYPO3\\CMS\\Frontend\\Typolink\\LinkResultInterface $linkResult) ¶

Update a link when a part was modified by an Event Listener.

param TYPO3\\CMS\\Frontend\\Typolink\\LinkResultInterface $linkResult: the linkResult

getLinkResult ( ) ¶

returntype: TYPO3\CMS\Frontend\Typolink\LinkResultInterface

getContentObjectRenderer ( ) ¶

returntype: TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer

getLinkInstructions ( ) ¶

Returns the original instructions / $linkConfiguration that were used to build the link

returntype: array