PHP object oriented programming: Exercises, Practice, Solution

PHP OOP : Exercises Practice Solution [ 19 exercises with solution ]

[An editor is available at the bottom of the page to write and execute the scripts. Go to the editor]

The following exercises cover a range of OOP concepts in PHP and will help you practice and reinforce your understanding of object-oriented programming.

1. Write a PHP class 'Rectangle' that has properties for length and width. Implement methods to calculate the rectangle's area and perimeter.
Click me to see the sample solution

2. Write a PHP class called 'Circle' that has a radius property. Implement methods to calculate the circle's area and circumference.
Click me to see the sample solution

3. Write a PHP class called 'Shape' with an abstract method 'calculateArea()'. Create two subclasses, 'Triangle' and 'Rectangle', that implement the 'calculateArea()' method.
Click me to see the sample solution

4. Write a PHP interface called 'Resizable' with a method 'resize()'. Implement the 'Resizable' interface in a class called 'Square' and add functionality to resize the square.
Click me to see the sample solution

5. Write a PHP class called 'Vehicle' with properties like 'brand', 'model', and 'year'. Implement a method to display the vehicle details.
Click me to see the sample solution

6. Write a PHP a class hierarchy for a library system, including classes like 'LibraryItem', 'Book', 'DVD', etc. Implement appropriate properties and methods for each class.
Click me to see the sample solution

7. Write a PHP class called 'Student' with properties like 'name', 'age', and 'grade'. Implement a method to display student information.
Click me to see the sample solution

8. Write a PHP a class called "BankAccount" with properties like "accountNumber" and "balance". Implement methods to deposit and withdraw money from the account.
Click me to see the sample solution

9. Write a PHP abstract class called 'Animal' with abstract methods like 'eat()' and 'makeSound()'. Create subclasses like 'Dog', 'Cat', and 'Bird' that implement these methods.
Click me to see the sample solution

10. Write a PHP class called 'Person' with properties like 'name' and 'age'. Implement the '__toString()' magic method to display person information.
Click me to see the sample solution

11. Write a class called 'Employee' that extends the 'Person' class and adds properties like 'salary' and 'position'. Implement methods to display employee details.
Click me to see the sample solution

12. Write a class called 'Product' with properties like 'name' and 'price'. Implement the 'Comparable' interface to compare products based on their prices.
Click me to see the sample solution

13. Write a class called 'Logger' with a static property called 'logCount' that keeps track of the number of log messages. Implement a static method to log a message.
Click me to see the sample solution

14. Write a class called 'Math' with static methods like 'add()', 'subtract()', and 'multiply()'. Use these methods to perform mathematical calculations.
Click me to see the sample solution

15. Write a PHP class called 'File' with properties like 'name' and 'size'. Implement a static method to calculate the total size of multiple files.
Click me to see the sample solution

16. Write a PHP class called 'Calculator' that has a private property called 'result'. Implement methods to perform basic arithmetic operations like addition and subtraction.
Click me to see the sample solution

17. Write a PHP class called 'ShoppingCart' with properties like 'items' and 'total'. Implement methods to add items to the cart and calculate the total cost.
Click me to see the sample solution

18. Write a PHP class called 'Logger' that uses the singleton design pattern to ensure only one instance of the class can be created.
Click me to see the sample solution

19. Write a class called 'Validation' with static methods to validate email addresses, passwords, and other common input fields.
Click me to see the sample solution

PHP Code Editor:

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.