Enum backed values in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a backed enum with string values.

PHP

<?php
enum Status: string {
    case Pending = [1];
    case Approved = 'approved';
    case Rejected = 'rejected';
}

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

Apending

B'pending'

C"pending"

DPending

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around string values

Using unquoted identifiers as values

The backed enum values must be strings enclosed in quotes. So 'pending' is correct.

2fill in blank

medium

Complete the code to get the backed value of the enum case.

PHP

<?php
enum Direction: string {
    case North = 'N';
    case South = 'S';
}

echo Direction::North->[1];

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

Avalue

Bname

CgetValue()

DtoString()

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like getValue() which do not exist

Using the name property instead of value

In PHP enums, the backed value of a case is accessed using the value property.

3fill in blank

hard

Fix the error in the code to get the enum case from a backed value.

PHP

<?php
enum Status: int {
    case Draft = 0;
    case Published = 1;
}

$status = Status::from([1]);
echo $status->name;

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

A'1'

B"Published"

C1

DPublished

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string instead of an integer to from()

Passing the case name instead of the backed value

The from method expects the backed value with the correct type. Since the enum is backed by int, use the integer 1, not a string.

4fill in blank

hard

Fill both blanks to create a backed enum and get a case from a backed value.

PHP

<?php
enum Level: [1] {
    case Low = 1;
    case High = 2;
}

echo Level::[2]->value;

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

Aint

BLow

CHigh

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using string as backing type when values are integers

Using the wrong case name

The enum is backed by integers, so use int. To get the value of the Low case, use Level::Low.

5fill in blank

hard

Fill all three blanks to define a backed enum, get a case from a value, and print its name.

PHP

<?php
enum Color: [1] {
    case Red = 'R';
    case Blue = 'B';
    case Green = 'G';
}

$color = Color::from([2]);
echo $color->[3];

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

Astring

B'B'

Cname

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using int as backing type when values are strings

Passing unquoted values for string backed enums

Using value property instead of name to print case name

The enum is backed by strings, so use string. To get the case from the backed value 'B', use from('B'). To print the case name, use the name property.