framework/web/DbSession.php
public function gcSession($maxLifetime)
    {
        $this->db->createCommand()
            ->delete($this->sessionTable, '[[expire]]<:expire', [':expire' => time()])
            ->execute();

        return true;
    }
public function gcSession($maxLifetime)
    {
        $this->db->createCommand()
            ->delete($this->sessionTable, '[[expire]]<:expire', [':expire' => time()])
            ->execute();

        return true;
    }
public function gcSession ( $ maxLifetime ) { $ this -> db -> createCommand ( ) -> delete ( $ this -> sessionTable , '[[expire]]<:expire' , [ ':expire' => time ( ) ] ) -> execute ( ) ; return true ; }
Session GC (garbage collection) handler.
@internal Do not call this method directly.
@param int $maxLifetime the number of seconds after which data will be seen as 'garbage' and cleaned up.
@return bool whether session is GCed successfully
Session GC ( garbage collection ) handler .