public function add($id)
    {
        if (isset($this->ids[$id])) {
            return false;
        }
        return $this->ids[$id] = true;
    }
public function add($id)
    {
        if (isset($this->ids[$id])) {
            return false;
        }
        return $this->ids[$id] = true;
    }
public function add ( $ id ) { if ( isset ( $ this -> ids [ $ id ] ) ) { return false ; } return $ this -> ids [ $ id ] = true ; }
Add an ID to the lookup table.
@param string $id ID to be added.
@return bool status, true if success, false if there's a dupe
Add an ID to the lookup table .