1. FUNCTION PROGRAMMING IS NO LONGER A GOOD WAY TO CODE IN PHP
Many developers still make use of functional programming. Now with functional programming, there have to be many calls for the inclusion of files that contain functions that perform interrelated tasks. Such can easily be done with Classes. Classes make it easier to structure your code and group interrelated methods in one file. For instance, we can create a class to handle user profiles, create an instance of that class, extend the class with another class, and many more.
2. USE CLASSES AND AUTOLOAD TO DO FEWER INCLUSIONS
Instead of making so many inclusions using the require and include directives in PHP, things can easily get out of hand in the sense that you lose track of your files and where they are called within your app. Using classes, we can have a directory to store all class files and call upon them using spl_autoload function which calls the classes without directly including it. The spl_autoload makes use of require and include directives once to call upon the class files.
3. USE NAMESPACES
Namespaces prevent conflicts among class names. With namespaces, one can specify a way to call a class without any naming conflict. When you include vendor class files, you will have nothing to worry about changing the names of your classes.
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