Trait declaration and usage in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a trait named Logger.

PHP

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

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

ATraitLogger

BLogTrait

CLoggerTrait

DLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' instead of 'trait' to declare a trait.

Using a different trait name than the one used later.

The trait is declared with the keyword trait followed by its name. Here, the correct name is Logger.

2fill in blank

medium

Complete the code to use the trait Logger inside the class Application.

PHP

<?php
class Application {
    use [1];
}
?>

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ALogTrait

BLogger

CApplicationTrait

DTraitLogger

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong trait name in the use statement.

Forgetting the semicolon after the use statement.

The use keyword inside a class includes the trait. The trait name is Logger.

3fill in blank

hard

Fix the error in the code by completing the trait usage syntax.

PHP

<?php
trait Logger {
    public function log($msg) {
        echo $msg;
    }
}

class App {
    [1] Logger;
}
?>

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Ausing

Buses

Cuse

Dinclude

Attempts:

3 left

💡 Hint

Common Mistakes

Writing 'uses' or 'using' instead of 'use'.

Trying to include traits like files with 'include'.

The correct keyword to include a trait inside a class is use.

4fill in blank

hard

Fill both blanks to declare a trait and use it inside a class.

PHP

<?php
[1] Logger {
    public function log($msg) {
        echo $msg;
    }
}

class System {
    [2] Logger;
}
?>

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Atrait

Bclass

Cuse

Dextends

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'class' instead of 'trait' to declare a trait.

Using 'extends' instead of 'use' to include a trait.

The trait is declared with trait and included in the class with use.

5fill in blank

hard

Fill all three blanks to create a trait, use it in a class, and call its method.

PHP

<?php
[1] Logger {
    public function log($msg) {
        echo $msg;
    }
}

class App {
    [2] Logger;

    public function run() {
        $this->[3]("Hello from trait!\n");
    }
}

$app = new App();
$app->run();
?>

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Atrait

Blog

Cuse

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a method name that does not exist in the trait.

Forgetting to include the trait with 'use' inside the class.

The trait is declared with trait, included in the class with use, and the method log is called.