Drill 5: Beginner mistake — Classes and namespaces

<?php
declare(strict_types=1);

namespace App\Content;

final class Lesson
{
    public function __construct(
        public readonly string $slug,
        public readonly string $title,
        public readonly int $minutes,
    ) {}

    public function isLong(): bool
    {
        return $this->minutes >= 15;
    }
}

$lesson = new Lesson('css-grid', 'CSS Grid', 18);
echo $lesson->isLong() ? 'Long' : 'Short';