PHP OOP Introduction Class and Object Tutorial in Hindi / Urdu part#9
In PHP, classes and objects are used to create reusable code and to organize related data and functions.
A class is a blueprint or template for creating objects, which are instances of the class. A class defines a set of properties (variables) and methods (functions) that describe the behavior and characteristics of the objects created from it.
To create an object from a class, you use the new keyword, followed by the name of the class and any necessary arguments for the class constructor. The constructor is a special method that is called when the object is created and is used to initialize the object's properties.
Once you have created an object, you can access its properties and methods using the object operator . You can also create multiple objects from the same class, each with its own set of property values.
In PHP, objects are often used to implement Object-Oriented Programming (OOP) concepts such as inheritance, encapsulation, and polymorphism. Inheritance allows you to create new classes that inherit properties and methods from existing classes. Encapsulation is the practice of hiding the internal details of an object and only exposing a public interface for accessing it. Polymorphism allows objects to be treated as instances of their parent class or any of their child classes, depending on the context in which they are used.
In PHP, classes and objects are a way of organizing and structuring code into reusable, modular components. A class is a blueprint for creating objects, which are instances of the class. An object is a concrete entity that has specific properties and methods defined by its class.
Classes in PHP are defined using the class keyword, followed by the class name and a code block containing the class's properties and methods. Properties are variables that hold data, while methods are functions that operate on that data. Properties and methods can have visibility modifiers (public, protected, or private) that control whether they can be accessed from outside the class.
To create an object from a class, you use the new keyword followed by the class name and any arguments that the class's constructor method requires. The constructor method is a special method that is called when an object is created, and it typically sets the initial values of the object's properties.
Once you have an object, you can access its properties and methods using the arrow operator . You can also create multiple objects from the same class, each with its own set of property values.
Classes and objects are a fundamental part of object-oriented programming (OOP), a programming paradigm that emphasizes the use of objects and their interactions to solve complex problems. OOP is a powerful tool for creating robust, maintainable code that can be easily extended and reused in different contexts.
Overall, classes and objects provide a powerful tool for creating modular, reusable, and maintainable code in PHP.
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