Object Oriented PHP:

PHP is a server-side scripting language, mainly used for web development but also used as a general-purpose programming language. Object-Oriented Programming (PHP OOP),  is a type of programming language principle added to php5, that helps in building complex, reusable web applications.

Why use object-oriented programming?

Procedural and object-oriented programming are two different ways to do the same thing. Neither style is “better” than the other — it’s largely down to personal preference — and you can freely mix and match procedural and object-oriented code in a single PHP script.

That said, there are some advantages that OOP can offer you as a developer:

• Easy to map onto real-world situations: As I mentioned earlier, objects can easily map onto real-world “objects” such as people, products, shopping carts, blog posts, and so on. This makes life easier when you set out to design your object-oriented applications, since the purpose of each object, as well as the relationship between objects, is already fairly clear.
• Easy to write modular code: OOP naturally lends itself to writing code in self-contained modules. By separating your code into distinct modules, you make your code more manageable, and easier to debug and extend.
• Easy to write reusable code: Writing reusable code can save you a great deal of time when writing an app, and over time you can build up a library of reusable code modules that you can use in many different apps. OOP makes it relatively easy to write reusable code, since data structures and functions are nicely encapsulated in a single, reusable object. It’s also possible to take an existing object and extend it to add new functionality for a specific application, which again makes objects easy to reuse.