Closure finisher

The "Closure finisher" can only be used within forms that are created programmatically. It allows you to execute your own finisher code without implementing/ declaring a finisher.

Table of contents

Important

Finishers are executed in the order defined in your form definition.

See Finisher execution order.

Options of the closure finisher

closure

Type: ?\Closure
Required: true
Default: null

The name of the field as shown in the form.

Using the closure finisher programmatically

This finisher can only be used in programmatically-created forms. It makes it possible to execute one's own finisher code without having to implement/ declare this finisher.

Usage through code:

<?php

use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Form\Domain\Finishers\ClosureFinisher;
use TYPO3\CMS\Form\Domain\Model\FormDefinition;

class SomeClass
{
    private function addClosureFinisher(FormDefinition $formDefinition)
    {

        $closureFinisher = GeneralUtility::makeInstance(ClosureFinisher::class);
        $closureFinisher->setOption('closure', function ($finisherContext)
        {
            $formRuntime = $finisherContext->getFormRuntime();
            // ...
        });
        $formDefinition->addFinisher($closureFinisher);
    }
}

This finisher is implemented in \TYPO3\CMS\Form\Domain\Finishers\ClosureFinisher.