Php advanced and object oriented programming pdf
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Object Oriented Programming in Php (OOP)
Object Oriented Programming in PHP
We can imagine our universe made of different objects like sun, earth, moon etc. Similarly we can imagine our car made of different objects like wheel, steering, gear etc. Same way there is object oriented programming concepts which assume everything as an object and implement a software using different objects. You can think of a class as a template for making many instances of the same kind or class of object. You define a class once and then make many objects that belong to it. Objects are also known as instance.
It is considered to be more powerful and fast for certain tasks than the normal way of programming in PHP. OOP helps you to create and manage tasks easily. OOP is harder to understand compared to other programming techniques. But, if you understand the following 4 terms you are almost done! The first term we find in OOP is class.
Defining PHP Classes
Python Beginner Tutorial 9 - Introduction to Classes (Object Oriented Programming)
PHP is a server-side scripting language, mainly used for web development but also used as a general-purpose programming language. The object is created with the help of the new keyword. Also, look into how we can access object properties via variables. When the properties and the methods of the parent class are accessed by the child class, we call the concept has inheritance. The child class can inherit the parent method and give own method implementation, this property is called overridden method. When the same method of the parent class is inherited we call as inherited method.
The three basic components of object orientation are; Object oriented analysis — functionality of the system Object oriented designing — architecture of the system Object oriented programming — implementation of the application Object Oriented Programming Principles The three major principles of OOP are; Encapsulation — this is concerned with hiding the implementation details and only exposing the methods. The main purpose of encapsulation is to; Reduce software development complexity — by hiding the implementation details and only exposing the operations, using a class becomes easy. Protect the internal state of an object — access to the class variables is via methods such as get and set, this makes the class flexible and easy to maintain. The internal implementation of the class can be changed without worrying about breaking the code that uses the class. Inheritance — this is concerned with the relationship between classes. The relationship takes the form of a parent and child.