OOP Concepts in PHP

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Questions and Answers

What is the primary purpose of OOP in programming?

To create a more complex programming paradigm

To reduce the amount of code

To relate programming with the real world (correct)

To create a faster programming language

What is a class in OOP?

A property of an object

A method of an object

A blueprint/template used to hold objects (correct)

An instance of a blueprint

What is an object in OOP?

A method of a class

A blueprint/template used to hold objects

An instance of a class (correct)

A property of a class

When an object is created from a class, what happens to its properties?

The object inherits all the properties and behaviors from the class Signup and view all the answers

What is the purpose of the 'class' keyword in PHP?

To define a class Signup and view all the answers

What is the difference between a class and an object?

An object is an instance of a class Signup and view all the answers

What is an example of a property of a Car class?

Make Signup and view all the answers

What is the purpose of curly braces in defining a PHP class?

To enclose the class definition Signup and view all the answers

What happens when individual objects are created from a class?

They inherit all the properties and behaviors from the class, but with the same values Signup and view all the answers

What is the main difference between a class and an object in OOP?

A class holds properties and behaviors, while an object is an instance of a class Signup and view all the answers

Which of the following is NOT a characteristic of a class in OOP?

It is an instance of an object Signup and view all the answers

What is the purpose of using the 'class' keyword in PHP?

To define a class Signup and view all the answers

What is an object's relationship with its class in OOP?

An object is an instance of a class Signup and view all the answers

What is true about the properties of an object in OOP?

An object's properties can be different from its class Signup and view all the answers

What is the main advantage of using OOP in programming?

It allows for code reuse Signup and view all the answers

What is the purpose of defining a class in PHP?

To create a blueprint for objects Signup and view all the answers

What is the relationship between a Car class and an Audi object in OOP?

An Audi object is an instance of a Car class Signup and view all the answers

What happens when an object is created from a class in OOP?

The object inherits all properties and behaviors from the class Signup and view all the answers

Study Notes

OOP Concepts

OOP is a programming paradigm that relates to the real world by considering everything as an object, which holds its own properties (data) and behaviors (functions).

Classes and Objects

A class is a blueprint or template used to hold objects along with their behavior and properties.
An object is an instance or occurrence of a class.
Example: A Car class can have properties like make, color, year, speed limit, etc., and each object (Audi, Mercedes, BMW, etc.) created from the class inherits all the properties and behaviors, but with different values.

Defining a PHP Class

A class is defined in PHP using the class keyword, followed by the name of the class and a pair of curly braces ({}).

OOP Concepts

OOP relates programming to the real world by considering everything as an object, which holds its own properties (data) and behaviors (functions) via methods.

Classes & Objects

A class is a blueprint or template that holds objects along with their behavior and properties.
An object is an instance or occurrence of a class.
Example: A class named Car can have properties like make, color, year, speed limit, etc.
Variables like make,make, make,color, year,andyear, and year,andspeed can hold the values of these properties.
When individual objects (e.g., Audi, Mercedes, BMW) are created from the Car class, they inherit all the properties and behaviors from the class, but each object will have different values for the properties.

Defining a PHP Class

A class is defined using the class keyword, followed by the name of the class and a pair of curly braces ({}).
This definition creates a blueprint or template for objects to be created from.