![]() ![]() Each object instance is completely independent, with its own properties and methods, and thus can be manipulated independently, even if they're of the same class. Call the methods of both the objects againĪs you can see in the above example, calling the getArea() method on different objects causes that method to operate on a different set of data. We can then use it wherever it's needed by simply including the Rectangle.php file.Įxample Run this code » getArea() // Output: 0 Let's create a PHP file named Rectangle.php and put the following example code inside it so that our class code should be separated from rest of the program. We can build several identical houses from the same blueprint, but each house may have different paints, interiors and families inside, as shown in the illustration below.Ī class can be declared using the class keyword, followed by the name of the class and a pair of curly braces ( ), as shown in the following example. While, an object is like an actual house built according to that blueprint. The blueprint itself is not a house, but is a detailed plan of the house. When individual objects are created, they inherit the same generic properties and behaviors, although each object may have different values for certain properties.įor example, think of a class as a blueprint for a house. ![]() A class is a self-contained, independent collection of variables and functions which work together to perform one or more specific tasks, while objects are individual instances of a class.Ī class acts as a template or blueprint from which lots of individual objects can be created. Tip: The idea behind Don't Repeat Yourself (DRY) principle is reducing the repetition of code by abstracting out the code that are common for the application and placing them at a single place and reuse them instead of repeating it.Ĭlasses and objects are the two main aspects of object-oriented programming. The following sections will describe how classes and objects work in PHP. It makes it possible to create more complicated behavior with less code and shorter development time and high degree of reusability.It helps you adhere to the "don't repeat yourself" (DRY) principle, and thus make your code much easier to maintain, modify and debug.It provides a clear modular structure for the programs.The most important ones are listed below: Object-oriented programming has several advantages over conventional or procedural style of programming. As opposed to procedural programming where the focus is on writing procedures or functions that perform operations on the data, in object-oriented programming the focus is on the creations of objects which contain both data and functions together. Object-Oriented Programming (OOP) is a programming model that is based on the concept of classes and objects. In this tutorial you will learn how to write code in object-oriented style in PHP.
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