How can the use of PHP include statements simplify the process of adding new car types and manufacturers to a website without directly editing the source code?

Using PHP include statements, you can create separate files for each car type and manufacturer, and then include them in the main source code. This way, when you want to add a new car type or manufacturer, you only need to create a new file for it without directly editing the main source code. This simplifies the process of adding new content to the website without risking errors or breaking the existing code.

// main.php

include 'car_types/sedan.php';
include 'car_types/suv.php';
include 'car_manufacturers/toyota.php';
include 'car_manufacturers/honda.php';