如果我在php类中有超过一百个数据成员（变量），它会明显变慢吗？

Question

I have a PHP class called Vehicle that manages everything pertaining to cars,motorbikes and trucks. I have over a hundred private variables that is associated with every db field in each of the tables cars,bikes,trucks.

For example: A car has: -Fuel Consumption -Max horsepower -Max torque .. etc.. so i have data members

private $fuel;
private $horsepower;
private $toque;

When I do a database query to find a car by id, i store all the rows inside their corresponding variables.

The car table has about 50 fields, the bikes table has 30 fieldsand the trucks 30 fields. So there is over 110 data members.

Is there a better way to do that?

Answer 1

Inheritance and polymorphism are your friends! The Car should be one class (with 50 properties), bike - another one (30 properties), truck - another (30 properties). They all should extend the Vehicle base class