ModifyVersionDifferencesEvent 

Example 

<?php

declare(strict_types=1);

namespace MyVendor\MyExtension\Workspaces\EventListener;

use TYPO3\CMS\Core\Attribute\AsEventListener;
use TYPO3\CMS\Core\Utility\DiffUtility;
use TYPO3\CMS\Workspaces\Event\ModifyVersionDifferencesEvent;

#[AsEventListener(
  identifier: 'my-extension/modify-version-differences',
)]
final readonly class MyEventListener
{
  public function __construct(
    private DiffUtility $diffUtility,
  ) {}

  public function __invoke(ModifyVersionDifferencesEvent $event): void
  {
    $differences = $event->getVersionDifferences();
    foreach ($differences as $key => $difference) {
      if ($difference['field'] === 'my_test_field') {
        $differences[$key]['content'] = $this->diffUtility->diff('a', 'b');
      }
    }

    $event->setVersionDifferences($differences);
  }
}

API 

class ModifyVersionDifferencesEvent

Fully qualified name

\TYPO3\CMS\Workspaces\Event\ModifyVersionDifferencesEvent

Listeners to this event will be able to modify the differences of versioned records

getVersionDifferences()

Get the version differences.

This array contains the differences of each field with the following keys:

• field: The corresponding field name
• label: The corresponding field label
• content: The field values difference

Returns

list<array{field: string,label: string,content: string}>

setVersionDifferences(array $versionDifferences)

Modifies the version differences data

param $versionDifferences

the versionDifferences

getLiveRecordData()

Returns the records live data (used to create the version difference)

Returns

list<array{field: string,label: string,content: string}>

getParameters()

Returns meta information like current stage and current workspace

Returns

stdClass