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    <h3>Editing: MemcachedSessionHandler.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\Storage\Handler;

/**
 * Memcached based session storage handler based on the Memcached class
 * provided by the PHP memcached extension.
 *
 * @see https://php.net/memcached
 *
 * @author Drak &lt;drak@zikula.org&gt;
 */
class MemcachedSessionHandler extends AbstractSessionHandler
{
    private $memcached;

    /**
     * @var int Time to live in seconds
     */
    private $ttl;

    /**
     * @var string Key prefix for shared environments
     */
    private $prefix;

    /**
     * Constructor.
     *
     * List of available options:
     *  * prefix: The prefix to use for the memcached keys in order to avoid collision
     *  * ttl: The time to live in seconds.
     *
     * @throws \InvalidArgumentException When unsupported options are passed
     */
    public function __construct(\Memcached $memcached, array $options = [])
    {
        $this-&gt;memcached = $memcached;

        if ($diff = array_diff(array_keys($options), ['prefix', 'expiretime', 'ttl'])) {
            throw new \InvalidArgumentException(sprintf('The following options are not supported &quot;%s&quot;.', implode(', ', $diff)));
        }

        $this-&gt;ttl = $options['expiretime'] ?? $options['ttl'] ?? null;
        $this-&gt;prefix = $options['prefix'] ?? 'sf2s';
    }

    /**
     * @return bool
     */
    #[\ReturnTypeWillChange]
    public function close()
    {
        return $this-&gt;memcached-&gt;quit();
    }

    /**
     * {@inheritdoc}
     */
    protected function doRead(string $sessionId)
    {
        return $this-&gt;memcached-&gt;get($this-&gt;prefix.$sessionId) ?: '';
    }

    /**
     * @return bool
     */
    #[\ReturnTypeWillChange]
    public function updateTimestamp($sessionId, $data)
    {
        $this-&gt;memcached-&gt;touch($this-&gt;prefix.$sessionId, $this-&gt;getCompatibleTtl());

        return true;
    }

    /**
     * {@inheritdoc}
     */
    protected function doWrite(string $sessionId, string $data)
    {
        return $this-&gt;memcached-&gt;set($this-&gt;prefix.$sessionId, $data, $this-&gt;getCompatibleTtl());
    }

    private function getCompatibleTtl(): int
    {
        $ttl = (int) ($this-&gt;ttl ?? \ini_get('session.gc_maxlifetime'));

        // If the relative TTL that is used exceeds 30 days, memcached will treat the value as Unix time.
        // We have to convert it to an absolute Unix time at this point, to make sure the TTL is correct.
        if ($ttl &gt; 60 * 60 * 24 * 30) {
            $ttl += time();
        }

        return $ttl;
    }

    /**
     * {@inheritdoc}
     */
    protected function doDestroy(string $sessionId)
    {
        $result = $this-&gt;memcached-&gt;delete($this-&gt;prefix.$sessionId);

        return $result || \Memcached::RES_NOTFOUND == $this-&gt;memcached-&gt;getResultCode();
    }

    /**
     * @return int|false
     */
    #[\ReturnTypeWillChange]
    public function gc($maxlifetime)
    {
        // not required here because memcached will auto expire the records anyhow.
        return 0;
    }

    /**
     * Return a Memcached instance.
     *
     * @return \Memcached
     */
    protected function getMemcached()
    {
        return $this-&gt;memcached;
    }
}
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