extends an abstract class and implements an interface

Concrete.php

<?php

interface NameInterface
{
    public function getName();
}

abstract class ValueObject implements NameInterface
{
    protected $name;

    public function getName()
    {
        return $this->name;
    }
}

class Concrete extends ValueObject
{
    public function setValue($value)
    {
        $this->name = $value;

        return $this;
    }
}

$c = (new Concrete())->setValue('test name');
echo $c->getName();