vendor/symfony/symfony/src/Symfony/Component/Form/Button.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Form;

use Symfony\Component\Form\Exception\AlreadySubmittedException;
use Symfony\Component\Form\Exception\BadMethodCallException;

/**
 * A form button.
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class Button implements \IteratorAggregate, FormInterface
{
    /**
     * @var FormInterface|null
     */
    private $parent;

    /**
     * @var FormConfigInterface
     */
    private $config;

    /**
     * @var bool
     */
    private $submitted = false;

    /**
     * Creates a new button from a form configuration.
     *
     * @param FormConfigInterface $config The button's configuration
     */
    public function __construct(FormConfigInterface $config)
    {
        $this->config = $config;
    }

    /**
     * Unsupported method.
     *
     * @param mixed $offset
     *
     * @return bool Always returns false
     */
    public function offsetExists($offset)
    {
        return false;
    }