silverstripe-framework/tests/php/Control/RequestHandlingTest/TestForm.php

<?php

namespace SilverStripe\Control\Tests\RequestHandlingTest;

use SilverStripe\Dev\TestOnly;
use SilverStripe\Forms\Form;

/**
 * Form for the test
 */
class TestForm extends Form implements TestOnly
{
	private static $url_handlers = array(
		'fields/$FieldName' => 'handleField',
		"POST " => "handleSubmission",
		"GET " => "handleGet",
	);

	// These are a different case from those in url_handlers to confirm that it's all case-insensitive
	private static $allowed_actions = array(
		'handlesubmission',
		'handlefield',
		'handleget',
	);

	public function handleField($request)
	{
		return $this->Fields()->dataFieldByName($request->param('FieldName'));
	}

	public function handleSubmission($request)
	{
		return "Form posted";
	}

	public function handleGet($request)
	{
		return "Get request on form";
	}
}