Test Your PHP Knowledge! 🔍 | 10 Must-Know MCQs on OOP & File Uploading

1. Which keyword is used to define a class in PHP?

a) class
b) object
c) define
d) new

2. What is the correct way to create an object from a class named Car?

a) $car = create Car();
b) $car = Car();
c) $car = new Car();
d) $car = class Car();

3. What is a constructor in PHP?

a) A method that destroys an object
b) A function that runs automatically when an object is created
c) A class name
d) A variable type

4. What is the correct syntax for a constructor method in PHP?

a) function __build()
b) function construct()
c) function __construct()
d) construct()

5. How do you inherit a class in PHP?

a) class Child inherits Parent {}
b) class Child extends Parent {}
c) class Parent uses Child {}
d) class Child inherits from Parent {}

6. Which PHP superglobal is used to handle file uploads?

a) $_POST
b) $_GET
c) $_FILES
d) $_UPLOAD

7. What HTML form attribute is required to upload files?

a) method="upload"
b) action="file.php"
c) enctype="multipart/form-data"
d) type="file"

8. What does the move_uploaded_file() function do in PHP?

a) Copies the file to a new location
b) Moves the uploaded file to a new directory
c) Uploads the file to MySQL
d) Opens a file for editing

9. How can you check the file type in PHP securely?

a) Using $_FILES['file']['name']
b) Using $_FILES['file']['type'] only
c) By checking the file extension with explode()
d) By using mime_content_type() or checking actual content

10. What is a common way to prevent uploading of dangerous file types (like .php) in PHP?

a) Use htmlspecialchars()
b) Rename all uploaded files
c) Check MIME type and extension, and allow only images like .jpg, .png, etc.
d) Compress the file

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