'int', 'name' => 'string', 'unit_name' => 'string' ]; public static function init_table() { $result = db_query('CREATE TABLE ' . static::$table_name . ' ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255) NOT NULL, unit_name VARCHAR(20) NULL );'); return $result; } public static function get_ing_values() { $ing_list = self::filter(array()); $result = array(); foreach($ing_list as $ing) { $result[] = [ $ing->get_id(), $ing->field_name . ' ('. $ing->field_unit_name .')' ]; } return $result; } }