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<?php
/* OpenDb - Open Lending Database Project
Copyright (C) 2001,2002 by Jason Pell
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
include_once("./functions/function.php");
include_once("./functions/utils.php");
/*
* function: mysql_session_open()
*
* Does nothing.
*/
function mysql_session_open($session_path, $session_name)
{
return TRUE;
}
/*
* function: mysql_session_close()
*/
function mysql_session_close()
{
return TRUE;
}
/*
* function: mysql_session_read()
*
* Reads the session data from the database
*/
function mysql_session_read($SID)
{
global $CONFIG_VARS;
$query = "SELECT value FROM ".$CONFIG_VARS['session_handler.session_table'].
" WHERE SID = '$SID' AND ".
" expiration > ". time();
$result = run_opendb_query($query, FALSE, 'session_handler');
if($result && @mysql_num_rows($result)>0)
{
$found = mysql_fetch_array($result);
mysql_free_result($result);
return $found['value'];
}
else
return "";
}
/*
* function: mysql_session_write()
*
* This function writes the session data to the database. If that SID
* already exists, then the existing data will be updated.
*/
function mysql_session_write($SID, $value)
{
global $CONFIG_VARS;
$expiration = time() + get_cfg_var("session.gc_maxlifetime");
$query = "INSERT INTO ".$CONFIG_VARS['session_handler.session_table'].
" VALUES('$SID', '$expiration', '$value')";
$result = run_opendb_query($query, FALSE, 'session_handler');
if($result && @mysql_affected_rows($result))
return TRUE;
else //if (! $result)
{
$query = "UPDATE ".$CONFIG_VARS['session_handler.session_table'].
" SET expiration = '$expiration',".
" value = '$value' WHERE ".
" SID = '$SID' AND expiration >". time();
$result = run_opendb_query($query, FALSE, 'session_handler');
if($result && @mysql_affected_rows($result))
return TRUE;
else
return FALSE;
}
//else
return FALSE;
}
/*
* function: mysql_session_destroy()
*
* Deletes all session information having input SID (only one row)
*/
function mysql_session_destroy($SID)
{
global $CONFIG_VARS;
$query = "DELETE FROM ".$CONFIG_VARS['session_handler.session_table'].
" WHERE SID = '$SID'";
$result = run_opendb_query($query, FALSE, 'session_handler');
if($result && @mysql_affected_rows($result))
return TRUE;
else
return FALSE;
}
/*
* function: mysql_session_gc()
*
* Deletes all sessions that have expired.
*/
function mysql_session_gc($maxlifetime)
{
global $CONFIG_VARS;
$query = "DELETE FROM ".$CONFIG_VARS['session_handler.session_table'].
" WHERE sess_expiration < ".time() - $maxlifetime;
$result = run_opendb_query($query, FALSE, 'session_handler');
if($result && @mysql_affected_rows($result))
return TRUE;
else
return FALSE;
}
// Attempt to change the ini value if required, but complain if not possible.
if(strtolower(ini_get("session.save_handler")) == "user" || ini_set("session.save_handler", "user"))
{
session_set_save_handler("mysql_session_open",
"mysql_session_close",
"mysql_session_read",
"mysql_session_write",
"mysql_session_destroy",
"mysql_session_gc");
}
else
{
opendb_log("session.php:: Cannot set session.save_handler to 'user'");
}
?>
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