/** * Returns an array containing, for each field, the arary key used for that * field in self::$_fields. * * @return array */ static function &fieldKeys() { if (!self::$_fieldKeys) { self::$_fieldKeys = array('id' => 'id', 'name' => 'name', 'abbreviation' => 'abbreviation', 'gmt' => 'gmt', 'offset' => 'offset', 'country_id' => 'country_id'); } return self::$_fieldKeys; }