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    <h3>Editing: AutoExpireFlashBag.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

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

namespace Symfony\Component\HttpFoundation\Session\Flash;

/**
 * AutoExpireFlashBag flash message container.
 *
 * @author Drak &lt;drak@zikula.org&gt;
 */
class AutoExpireFlashBag implements FlashBagInterface
{
    private string $name = 'flashes';
    private array $flashes = ['display' =&gt; [], 'new' =&gt; []];
    private string $storageKey;

    /**
     * @param string $storageKey The key used to store flashes in the session
     */
    public function __construct(string $storageKey = '_symfony_flashes')
    {
        $this-&gt;storageKey = $storageKey;
    }

    public function getName(): string
    {
        return $this-&gt;name;
    }

    public function setName(string $name)
    {
        $this-&gt;name = $name;
    }

    public function initialize(array &amp;$flashes)
    {
        $this-&gt;flashes = &amp;$flashes;

        // The logic: messages from the last request will be stored in new, so we move them to previous
        // This request we will show what is in 'display'.  What is placed into 'new' this time round will
        // be moved to display next time round.
        $this-&gt;flashes['display'] = \array_key_exists('new', $this-&gt;flashes) ? $this-&gt;flashes['new'] : [];
        $this-&gt;flashes['new'] = [];
    }

    public function add(string $type, mixed $message)
    {
        $this-&gt;flashes['new'][$type][] = $message;
    }

    public function peek(string $type, array $default = []): array
    {
        return $this-&gt;has($type) ? $this-&gt;flashes['display'][$type] : $default;
    }

    public function peekAll(): array
    {
        return \array_key_exists('display', $this-&gt;flashes) ? $this-&gt;flashes['display'] : [];
    }

    public function get(string $type, array $default = []): array
    {
        $return = $default;

        if (!$this-&gt;has($type)) {
            return $return;
        }

        if (isset($this-&gt;flashes['display'][$type])) {
            $return = $this-&gt;flashes['display'][$type];
            unset($this-&gt;flashes['display'][$type]);
        }

        return $return;
    }

    public function all(): array
    {
        $return = $this-&gt;flashes['display'];
        $this-&gt;flashes['display'] = [];

        return $return;
    }

    public function setAll(array $messages)
    {
        $this-&gt;flashes['new'] = $messages;
    }

    public function set(string $type, string|array $messages)
    {
        $this-&gt;flashes['new'][$type] = (array) $messages;
    }

    public function has(string $type): bool
    {
        return \array_key_exists($type, $this-&gt;flashes['display']) &amp;&amp; $this-&gt;flashes['display'][$type];
    }

    public function keys(): array
    {
        return array_keys($this-&gt;flashes['display']);
    }

    public function getStorageKey(): string
    {
        return $this-&gt;storageKey;
    }

    public function clear(): mixed
    {
        return $this-&gt;all();
    }
}
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