Constants in classes in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a constant named PI with value 3.14 inside the class.

PHP

<?php
class Circle {
    const [1] = 3.14;
}
?>

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

Api

BPI

CRadius

DVALUE

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase constant names like 'pi' instead of 'PI'.

Trying to use variables instead of constants.

The constant name is PI as per convention and the problem statement.

2fill in blank

medium

Complete the code to access the constant PI from the Circle class.

PHP

<?php
class Circle {
    const PI = 3.14;
}
echo Circle::[1];
?>

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API

Bpi

CRadius

Dvalue

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'pi' instead of 'PI'.

Trying to access constants like variables with $.

Constants are accessed using the class name, double colon, and the constant name exactly as declared, which is PI.

3fill in blank

hard

Fix the error in the code to correctly access the constant MAX_SPEED inside the Car class.

PHP

<?php
class Car {
    const MAX_SPEED = 200;
    public function getMaxSpeed() {
        return self::[1];
    }
}
?>

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A$MAX_SPEED

Bmax_speed

CMax_Speed

DMAX_SPEED

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or camel case names instead of uppercase.

Using $ sign before constant name.

Inside the class, constants are accessed with self::CONSTANT_NAME using the exact constant name MAX_SPEED.

4fill in blank

hard

Fill both blanks to define a constant SPEED_LIMIT and access it inside the class method.

PHP

<?php
class Bike {
    const [1] = 100;
    public function getSpeedLimit() {
        return self::[2];
    }
}
?>

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ASPEED_LIMIT

Bspeed_limit

CMAX_SPEED

DLIMIT

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for declaration and access.

Using lowercase names for constants.

The constant name must be the same in both declaration and access: SPEED_LIMIT.

5fill in blank

hard

Fill all three blanks to define a constant COLOR, access it inside the class, and print it outside the class.

PHP

<?php
class Car {
    const [1] = 'red';
    public function getColor() {
        return self::[2];
    }
}
echo Car::[3];
?>

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

Acolor

BCOLOR

CColor

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or different case names.

Trying to access constants like variables.

The constant name is COLOR and must be used exactly as declared both inside and outside the class.