🟢 Beginner Level
1. Class & Object
Create a class Car with properties:
- brand
- model
Create a method showDetails() to print car details.
2. Constructor
Create a class Student with:
- name
- age
Initialize values using a constructor and display them.
3. Method Calling
Create a class Calculator with methods:
- add()
- subtract()
- multiply()
- divide()
🟡 Intermediate Level
4. Inheritance
Create a parent class Animal with method makeSound()
Create child classes:
- Dog → “Bark”
- Cat → “Meow”
5. Encapsulation
Create a class BankAccount:
- private property: balance
- methods: deposit(), withdraw(), getBalance()
6. Static Methods & Properties
Create a class Counter:
- static property
$count - static method
increment()
7. Constants
Create a class MathConstants:
- define
PI - use it in a method to calculate area of a circle
🔵 Advanced Level
8. Abstract Class
Create abstract class Shape:
- abstract method
area()
Child classes:
- Circle
- Rectangle
9. Interface
Create interface Payment:
- method
pay()
Classes:
- CreditCard
- PayPal
10. Polymorphism
Create multiple classes with same method draw():
- Circle
- Square
- Triangle
11. Magic Methods
Create a class User:
- use
__construct() - use
__destruct() - use
__toString()
12. File Handling with OOP
Create a class FileManager:
- read file
- write file
🔴 Real-World Practice (Important 🚀)
13. Mini Project – User Login System
- Class
User - Register user
- Login user
- Validate password
14. Shopping Cart System
- Product class
- Cart class
- Add/remove items
- Calculate total
15. Blog System (OOP)
- Post class
- Comment class
- User class
💡 Bonus Interview Questions
- What is OOP?
- Difference between Interface & Abstract Class?
- What is encapsulation?
- What is polymorphism?
- What is late static binding?
