Properties and visibility in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a public property named $name.

PHP

<?php
class Person {
    [1] $name;
}
?>

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

Avar

Bprivate

Cprotected

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using private or protected which restrict access.

The public keyword makes the property accessible from anywhere.

2fill in blank

medium

Complete the code to make the property $age accessible only within the class and its subclasses.

PHP

<?php
class Person {
    [1] $age;
}
?>

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

Aprivate

Bprotected

Cpublic

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using private which restricts access only to the class itself.

The protected keyword restricts access to the class itself and its subclasses.

3fill in blank

hard

Fix the error in the code by choosing the correct visibility keyword for the property $salary that should be accessible only inside the class.

PHP

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

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

Aprivate

Bprotected

Cvar

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using public or protected which allow wider access.

The private keyword restricts access to the property only within the class itself.

4fill in blank

hard

Fill both blanks to declare a protected property $data and initialize it with an empty array.

PHP

<?php
class Container {
    [1] $data = [2];
}
?>

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

Aprotected

B[]

Carray()

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using public instead of protected.

Using array() instead of [] (both valid but only one is correct here).

The property is declared protected and initialized with an empty array using [].

5fill in blank

hard

Fill all three blanks to declare a private property $count, initialize it to zero, and increment it by one inside a method.

PHP

<?php
class Counter {
    [1] $count = [2];

    public function increment() {
        $this->count [3] 1;
    }
}
?>

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

Aprivate

B0

C+=

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Using public instead of private.

Using =+ instead of += for increment.

The property is declared private, initialized to 0, and incremented using +=.