<?php

// my comment

class Foo {
    protected const value = 10;

    public function __construct() {
        echo "Foo", PHP_EOL;
    }

    public function getValue() {
        return self::value;
    }
}

trait MyTrait {
    public function __construct() {
        echo "MyTrait", PHP_EOL;
    }
}

class Bar extends Foo {
    use MyTrait;

    protected const value = 20;
}

$b = new Bar();
echo $b->getValue();