static function getColumnNames() {
		$class = get_called_class();
		if (!isset(self::$_columnNames[$class])) {
			self::$_columnNames[$class] = array_keys(static::$_columns);
		}

		return self::$_columnNames[$class];
	}
static function getColumnNames() {
		$class = get_called_class();
		if (!isset(self::$_columnNames[$class])) {
			self::$_columnNames[$class] = array_keys(static::$_columns);
		}

		return self::$_columnNames[$class];
	}
static function getColumnNames ( ) { $ class = get_called_class ( ) ; if ( ! isset ( self :: $ _columnNames [ $ class ] ) ) { self :: $ _columnNames [ $ class ] = array_keys ( static :: $ _columns ) ; } return self :: $ _columnNames [ $ class ] ; }
Access to array of column names
@return array
Access to array of column names