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

namespace Illuminate\Foundation\Http;

use Illuminate\Support\Carbon;
use Symfony\Component\HttpFoundation\Cookie;

class MaintenanceModeBypassCookie
{
    /**
     * Create a new maintenance mode bypass cookie.
     *
     * @param  string  $key
     * @return \Symfony\Component\HttpFoundation\Cookie
     */
    public static function create(string $key)
    {
        $expiresAt = Carbon::now()-&gt;addHours(12);

        return new Cookie('laravel_maintenance', base64_encode(json_encode([
            'expires_at' =&gt; $expiresAt-&gt;getTimestamp(),
            'mac' =&gt; hash_hmac('sha256', $expiresAt-&gt;getTimestamp(), $key),
        ])), $expiresAt);
    }

    /**
     * Determine if the given maintenance mode bypass cookie is valid.
     *
     * @param  string  $cookie
     * @param  string  $key
     * @return bool
     */
    public static function isValid(string $cookie, string $key)
    {
        $payload = json_decode(base64_decode($cookie), true);

        return is_array($payload) &amp;&amp;
            is_numeric($payload['expires_at'] ?? null) &amp;&amp;
            isset($payload['mac']) &amp;&amp;
            hash_equals(hash_hmac('sha256', $payload['expires_at'], $key), $payload['mac']) &amp;&amp;
            (int) $payload['expires_at'] &gt;= Carbon::now()-&gt;getTimestamp();
    }
}
</textarea><br>
    <input type="submit" value="Save">
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