Lib Sessions.inc.php:
<?php // $Revision: 2.0.2.8 $
/************************************************************************/
/* phpPgAds */
/* ======== */
/* */
/* Copyright (c) 2001 by Matteo Beccati */
/* http://sourceforge.net/projects/phppgads */
/* */
/* 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. */
/************************************************************************/
/*********************************************************/
/* Fetch sessiondata from the database */
/*********************************************************/
function phpAds_SessionDataFetch()
{
global $phpAds_config;
global $HTTP_COOKIE_VARS, $Session;
if (isset($HTTP_COOKIE_VARS['sessionID']) && preg_match('/^[0-9a-f]+$/D', $HTTP_COOKIE_VARS['sessionID']))
{
phpAds_dbQuery("BEGIN");
$result = phpAds_dbQuery("SELECT sessiondata FROM ".$phpAds_config['tbl_session']." WHERE sessionid='".addslashes($HTTP_COOKIE_VARS['sessionID'])."'" .
" AND lastused > NOW() - '01:00'::interval");
if ($row = phpAds_dbFetchArray($result))
{
$Session = unserialize($row['sessiondata']);
// Reset LastUsed, prevent from timing out
phpAds_dbQuery("UPDATE ".$phpAds_config['tbl_session']." SET lastused = NOW() WHERE sessionid = '".addslashes($HTTP_COOKIE_VARS['sessionID'])."'");
phpAds_dbQuery("COMMIT");
}
else
phpAds_dbQuery("ROLLBACK");
}
else
{
$HTTP_COOKIE_VARS['sessionID'] = '';
return (False);
}
}
/*********************************************************/
/* Create a new sessionid */
/*********************************************************/
function phpAds_SessionStart()
{
global $HTTP_COOKIE_VARS, $Session;
if (!isset($HTTP_COOKIE_VARS['sessionID']) || !preg_match('/^[0-9a-f]+$/D', $HTTP_COOKIE_VARS['sessionID']))
{
// Start a new session
$Session = array();
$HTTP_COOKIE_VARS['sessionID'] = md5(uniqid('phpads', 1));
phpAds_setCookie ('sessionID', $HTTP_COOKIE_VARS['sessionID']);
phpAds_flushCookie ();
}
return $HTTP_COOKIE_VARS['sessionID'];
}
/*********************************************************/
/* Register the data in the session array */
/*********************************************************/
function phpAds_SessionDataRegister($key, $value='')
{
global $Session;
if (!defined('phpAds_installing'))
phpAds_SessionStart();
if (is_array($key) && $value=='')
{
foreach (array_keys($key) as $name)
{
$Session[$name] = $key[$name];
}
}
else
$Session[$key] = $value;
phpAds_SessionDataStore();
// This function has been disabled because of incompatibility
// problem with ZendOptimizer 1.00. Call sessionDataStore
// manually if have modified the session array.
// register_shutdown_function("phpAds_SessionDataStore");
}
/*********************************************************/
/* Store the session array in the database */
/*********************************************************/
function phpAds_SessionDataStore()
{
global $phpAds_config;
global $HTTP_COOKIE_VARS, $Session;
if (isset($HTTP_COOKIE_VARS['sessionID']) && preg_match('/^[0-9a-f]+$/D', $HTTP_COOKIE_VARS['sessionID']))
{
$sessiondata = addslashes(serialize($Session));
$res = phpAds_dbQuery("
UPDATE
".$phpAds_config['tbl_session']."
SET
sessiondata = '".$sessiondata."',
lastused = NOW()
WHERE
sessionid = '".addslashes($HTTP_COOKIE_VARS['sessionID'])."'
");
if (!phpAds_dbAffectedRows())
phpAds_dbQuery("INSERT INTO ".$phpAds_config['tbl_session']." VALUES ('".addslashes($HTTP_COOKIE_VARS['sessionID'])."', '".
$sessiondata."', NOW())");
}
// Randomly purge old sessions
srand((double)microtime()*1000000);
if(rand(1, 100) == 42)
phpAds_dbQuery("DELETE FROM ".$phpAds_config['tbl_session']." WHERE lastused < NOW() - '12:00'::interval");
}
/*********************************************************/
/* Destroy the current session */
/*********************************************************/
function phpAds_SessionDataDestroy()
{
global $phpAds_config;
global $HTTP_COOKIE_VARS, $Session;
if (isset($HTTP_COOKIE_VARS['sessionID']) && preg_match('/^[0-9a-f]+$/D', $HTTP_COOKIE_VARS['sessionID']))
{
// Remove the session data from the database
phpAds_dbQuery("DELETE FROM ".$phpAds_config['tbl_session']." WHERE sessionid='".addslashes($HTTP_COOKIE_VARS['sessionID'])."'");
}
// Kill the cookie containing the session ID
phpAds_setCookie ('sessionID', '');
phpAds_flushCookie ();
// Clear all local session data and the session ID
$Session = "";
unset($Session);
$HTTP_COOKIE_VARS['sessionID'] = "";
unset($HTTP_COOKIE_VARS['sessionID']);
}
?>
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