Interface vs abstract class vs trait in PHP - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an interface named Logger.

PHP

<?php
interface [1] {
    public function log(string $msg);
}
?>

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ALogTrait

BLogger

CLogInterface

DAbstractLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Using trait or abstract class names instead of interface name.

The keyword interface is followed by the interface name. Here, the interface is named Logger.

2fill in blank

medium

Complete the code to declare an abstract class named Vehicle.

PHP

<?php
abstract class [1] {
    abstract public function startEngine();
}
?>

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ADrive

BCar

CVehicle

DEngine

Attempts:

3 left

💡 Hint

Common Mistakes

Using specific class names instead of a general abstract class name.

The keyword abstract class is followed by the class name. Here, the abstract class is named Vehicle.

3fill in blank

hard

Fix the error in the trait declaration by completing the code.

PHP

<?php
trait [1] {
    public function sayHello() {
        echo "Hello!";
    }
}
?>

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AGreetingTrait

BHelloInterface

CAbstractGreeting

DSayHelloClass

Attempts:

3 left

💡 Hint

Common Mistakes

Using interface or class names instead of trait name.

The keyword trait is followed by the trait name. Here, the trait is named GreetingTrait.

4fill in blank

hard

Fill both blanks to implement the Logger interface and use the GreetingTrait in the class.

PHP

<?php
class User implements [1] {
    use [2];
    public function log(string $msg) {
        echo $msg;
    }
}
?>

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

ALogger

BGreetingTrait

CLogTrait

DAbstractLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing trait names with interface names.

Using wrong keywords for implementation or usage.

The class User implements the Logger interface and uses the GreetingTrait trait to add behavior.

5fill in blank

hard

Fill all three blanks to declare an abstract class with an abstract method and use a trait inside it.

PHP

<?php
abstract class [1] {
    use [2];
    abstract public function [3]();
}
?>

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

AVehicle

BGreetingTrait

CstartEngine

DLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Using interface names instead of class names.

Confusing method names with trait or class names.

The abstract class Vehicle uses the trait GreetingTrait and declares an abstract method startEngine.