friendica/src/Core/Session/DatabaseSessionHandler.php

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<?php
namespace Friendica\Core\Session;
use Friendica\BaseObject;
use Friendica\Core\Session;
use Friendica\Database\DBA;
use SessionHandlerInterface;
require_once 'boot.php';
require_once 'include/dba.php';
require_once 'include/text.php';
/**
* SessionHandler using database
*
* @author Hypolite Petovan <mrpetovan@gmail.com>
*/
class DatabaseSessionHandler extends BaseObject implements SessionHandlerInterface
{
public function open($save_path, $session_name)
{
return true;
}
public function read($session_id)
{
if (!x($session_id)) {
return '';
}
$session = DBA::selectFirst('session', ['data'], ['sid' => $session_id]);
if (DBA::is_result($session)) {
Session::$exists = true;
return $session['data'];
}
logger("no data for session $session_id", LOGGER_TRACE);
return '';
}
/**
* @brief Standard PHP session write callback
*
* This callback updates the DB-stored session data and/or the expiration depending
* on the case. Uses the Session::expire global for existing session, 5 minutes
* for newly created session.
*
* @param string $session_id Session ID with format: [a-z0-9]{26}
* @param string $session_data Serialized session data
* @return boolean Returns false if parameters are missing, true otherwise
*/
public function write($session_id, $session_data)
{
if (!$session_id) {
return false;
}
if (!$session_data) {
return true;
}
$expire = time() + Session::$expire;
$default_expire = time() + 300;
if (Session::$exists) {
$fields = ['data' => $session_data, 'expire' => $expire];
$condition = ["`sid` = ? AND (`data` != ? OR `expire` != ?)", $session_id, $session_data, $expire];
DBA::update('session', $fields, $condition);
} else {
$fields = ['sid' => $session_id, 'expire' => $default_expire, 'data' => $session_data];
DBA::insert('session', $fields);
}
return true;
}
public function close()
{
return true;
}
public function destroy($id)
{
DBA::delete('session', ['sid' => $id]);
return true;
}
public function gc($maxlifetime)
{
DBA::delete('session', ["`expire` < ?", time()]);
return true;
}
}