FormlessAction.php
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Actions

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FormlessAction.php
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	<?php
	/**
	* Base classes for actions done on pages.
	*
	* @license GPL-2.0-or-later
	* @file
	* @ingroup Actions
	*/

	namespace MediaWiki\Actions;

	/**
	* An action which just does something, without showing a form first.
	*
	* @stable to extend
	*
	* @ingroup Actions
	*/
	abstract class FormlessAction extends Action {

	/**
	* Show something on GET request.
	* @return string\|null Will be added to the HTMLForm if present, or just added to the
	* output if not. Return null to not add anything
	*/
	abstract public function onView();

	/**
	* @stable to override
	*/
	public function show() {
	$this->setHeaders();

	// This will throw exceptions if there's a problem
	$this->checkCanExecute( $this->getUser() );

	$this->getOutput()->addHTML( $this->onView() );
	}
	}

	/** @deprecated class alias since 1.44 */
	class_alias( FormlessAction::class, 'FormlessAction' );