Access modifiers (public, private, protected) in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a public property in the class.

PHP

<?php
class Car {
    [1] $color;
}
?>

Drag options to blanks, or click blank then click option'

Apublic

Bprivate

Cprotected

Dstatic

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'private' or 'protected' instead of 'public' for properties meant to be accessed outside.

The public modifier allows the property to be accessed from anywhere.

2fill in blank

medium

Complete the code to declare a private method inside the class.

PHP

<?php
class User {
    [1] function setPassword($pass) {
        // code here
    }
}
?>

Drag options to blanks, or click blank then click option'

Afinal

Bpublic

Cprotected

Dprivate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'public' or 'protected' when the method should be private.

The private modifier restricts method access to within the class only.

3fill in blank

hard

Fix the error in the code by choosing the correct access modifier for the property.

PHP

<?php
class BankAccount {
    [1] $balance = 0;

    public function getBalance() {
        return $this->balance;
    }
}
?>

Drag options to blanks, or click blank then click option'

Apublic

Bprivate

Cprotected

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'public' allows direct access which is unsafe for sensitive data.

The private modifier protects the balance property from being changed directly outside the class.

4fill in blank

hard

Fill both blanks to declare a protected property and a public method to access it.

PHP

<?php
class Employee {
    [1] $salary;

    [2] function getSalary() {
        return $this->salary;
    }
}
?>

Drag options to blanks, or click blank then click option'

Aprotected

Bprivate

Cpublic

Dstatic

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'private' for the property when subclass access is needed.

Not making the method public to allow outside access.

The protected property can be accessed within the class and subclasses. The public method allows outside access to the salary.

5fill in blank

hard

Fill all three blanks to declare a private property, a protected method, and a public method.

PHP

<?php
class Document {
    [1] $content;

    [2] function editContent($newContent) {
        $this->content = $newContent;
    }

    [3] function readContent() {
        return $this->content;
    }
}
?>

Drag options to blanks, or click blank then click option'

Aprivate

Bprotected

Cpublic

Dfinal

Attempts:

3 left

💡 Hint

Common Mistakes

Using public for the property exposes it directly.

Making editContent public when it should be protected.

The private property stores content hidden from outside. The protected method allows editing inside the class or subclasses. The public method allows reading content from anywhere.