Programming and Web Design

Creating a Class: To create a class use the class keyword and a name. Class names can be any combination of numbers and letters, although they must not begin with a number. The code associated with a class must be enclosed within braces. Class Defination: <?php class ClassName {   // class body } ?> For example: <?php class Books{ public $name; public $author; public function showBook(){ $name="Munna Madan"; echo $name; } } ?> Setting Properties and Methods In the class body are defined its properties and methods.         - Properties are variables defined inside the class.         - Methods are functions created within the class, with the word "function". The name of the variable (property) and the "function" word must be preceded by a specific attribute that determines the level of access that is allowed for the property or the method to be accessed outside its class. This can be: public, protec...

PHP is an object- oriented programming language. What is object-oriented programming (OOP)? Object-oriented programming(OOP) is a programming language using objects usually instances of a class, consisting of data fields and methods together with their interactions to design applications and computer programs. Main features of OOP are as below:  Class and object:     A class is a group of objects and an object is an instance of a class. It contains the code for properties and methods. Encapsulation:     Encapsulation is the ability of an object to protect the data (properties) of a class from outside influences. You can use a class (its properties) through an object instance, without having access to its code. Inheritance:     Inheritance is the ability of a class to copy or inherit the properties and methods of a parent class. Polymorphism:     Polymorphism is a class ability to do more different things, or use one clas...