/**
* Do periodic cleanup of the CiviCRM session table.
*
* Also delete all session cache entries which are a couple of days old.
* This keeps the session cache to a manageable size
*
* @param bool $session
* @param bool $table
* @param bool $prevNext
*/
public static function cleanup($session = FALSE, $table = FALSE, $prevNext = FALSE)
{
// clean up the session cache every $cacheCleanUpNumber probabilistically
$cleanUpNumber = 757;
// clean up all sessions older than $cacheTimeIntervalDays days
$timeIntervalDays = 2;
$timeIntervalMins = 30;
if (mt_rand(1, 100000) % $cleanUpNumber == 0) {
$session = $table = $prevNext = TRUE;
}
if (!$session && !$table && !$prevNext) {
return;
}
if ($prevNext) {
// delete all PrevNext caches
CRM_Core_BAO_PrevNextCache::cleanupCache();
}
if ($table) {
CRM_Core_Config::clearTempTables($timeIntervalDays . ' day');
}
if ($session) {
// first delete all sessions which are related to any potential transaction
// page
$transactionPages = array('CRM_Contribute_Controller_Contribution', 'CRM_Event_Controller_Registration');
$params = array(1 => array(date('Y-m-d H:i:s', time() - $timeIntervalMins * 60), 'String'));
foreach ($transactionPages as $trPage) {
$params[] = array("%{$trPage}%", 'String');
$where[] = 'path LIKE %' . count($params);
}
$sql = "\nDELETE FROM civicrm_cache\nWHERE group_name = 'CiviCRM Session'\nAND created_date <= %1\nAND (" . implode(' OR ', $where) . ")";
CRM_Core_DAO::executeQuery($sql, $params);
$sql = "\nDELETE FROM civicrm_cache\nWHERE group_name = 'CiviCRM Session'\nAND created_date < date_sub( NOW( ), INTERVAL {$timeIntervalDays} DAY )\n";
CRM_Core_DAO::executeQuery($sql);
}
}