/**
* Check for existing session with id $sid
* @param string $sid
* @return boolean true if session found.
*/
public function session_exists($sid)
{
global $CFG;
try {
$sql = "SELECT * FROM {sessions} WHERE timemodified < ? AND sid=? AND state=?";
$params = array(time() + $CFG->sessiontimeout, $sid, 0);
return $this->database->record_exists_sql($sql, $params);
} catch (dml_exception $ex) {
error_log('Error checking existance of database session');
return false;
}
}
