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session.php
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session.php
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<?PHP
/*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
?>
<?PHP
/** Maintain user session */
session_start();
// This session expiration/regeneration code was adapted from http://stackoverflow.com/questions/520237/how-do-i-expire-a-php-session-after-30-minutes
if (isset($_SESSION['login']) && isset($_SESSION['LAST_ACTIVITY']) && isset($_SESSION['CREATED'])) {
// check if session still valid
if ((time() - $_SESSION['LAST_ACTIVITY']) > $SESSION_TIMEOUT) {
logoff();
} elseif (time() - $_SESSION['CREATED'] > $SESSION_TIMEOUT * 10) {
// session started more than $SESSION_TIMEOUT * 10 ago, regenerate sessionid
session_regenerate_id(true); // change session ID for the current session an invalidate old session ID
}
} else {
logoff();
}
?>