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<?php
/**
* SessionHandler:: implementation for DBM files.
*
* $Horde: horde/lib/SessionHandler/dbm.php,v 1.3.2.3 2003/05/19 19:26:07 slusarz Exp $
*
* Copyright 2002-2003 Chuck Hagenbuch <chuck@horde.org>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @version $Revision: 1.3.2.3 $
* @since Horde 2.2
* @package horde.session
*/
class SessionHandler_dbm extends SessionHandler {
/**
* Our pointer to the DBM file, if open.
*
* @var resource $_dbm
*/
var $_dbm;
/**
* Constructs a new DBM SessionHandler object.
*
* @access public
*
* @param optional array $params Unused.
*/
function SessionHandler_dbm($params = array())
{
}
function open($save_path, $session_name)
{
$this->_dbm = @dbmopen("$save_path/$session_name", 'c');
return $this->_dbm;
}
function close()
{
return @dbmclose($this->_dbm);
}
function read($id)
{
$session_data = '';
if ($data = dbmfetch($this->_dbm, $id)) {
$session_data = base64_decode(substr($data, strpos($data, '|') + 1));
}
return $session_data;
}
function write($id, $session_data)
{
return @dbmreplace($this->_dbm, $id, time() . '|' . base64_encode($session_data));
}
function destroy($id)
{
$result = @dbmdelete($this->_dbm, $id);
if (!$result) {
Horde::logMessage('Failed to delete session (id = ' . $id . ')', __FILE__, __LINE__, LOG_ERR);
return false;
}
return true;
}
function gc($maxlifetime = 300)
{
$expired = time() - $maxlifetime;
$id = dbmfirstkey($this->_dbm);
while ($id) {
if ($data = dbmfetch($this->_dbm, $id)) {
$age = substr($tmp, 0, strpos($data, '|'));
if ($expired > $age) {
$this->destroy($id);
}
}
$id = dbmnextkey($this->_dbm, $id);
}
return true;
}
}
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