PHP - Interview Question

CerseiLannister.php

<?php

namespace Cinema\Cast;

class CerseiLannister
{
    private string $name = 'Cersei Lannister';

    private JoannaLannister $child;

    function __construct(JoannaLannister $joannaLannister)
    {
        $this->child = $joannaLannister;
    }

    protected function name(): string
    {
        return $this->name;
    }

    private function getCerseisChild(): JoannaLannister
    {
        return $this->child;
    }
}

index.php

<?php

namespace MyApp;

use Cinema\Cast\Families;

echo (new Families\TheLannisters)->getFamilyNames();

Jaime.php

<?php

namespace Cinema\Cast;

class Jaime
{
    private string $firstName = 'Jaime';

    private string $lastName = 'Lannister';
   
    
    function __construct(JoannaLannister $joannaLannister)
    {
        $this->child = new JoannaLannister;
    }    

    function getJaimiesName(): string
    {
        return $this->firstName . ' ' . $this->lastName;
    }
    
    public function getChild(): JoannaLannister;
    {
        return $this->child;   
    }
}

JoannaLannister.php

<?php

namespace Cinema\Cast;

class JoannaLannister
{
    private string $firstName = 'Joanna';

    private string $lastName = 'Lannister';

    function the_name()
    {
        return $this->firstName . ' ' . $this->lastName;
    }
}

TheLannisters.php

<?php

namespace Cinema\Cast\Families;

class TheLannisters
{
    private array $members;

    public function __construct()
    {
        $this->members['jaime'] = new Jaime;

        $this->members['joanna'] = new JoannaLannister;

        $this->members['cersei'] = new CerseiLannister($this->members['joanna']);
    }

    function getFamilyNames():? string
    {
        echo 'The Lannisters:';

        echo $this->members['jaime']->getJaimiesName() . "\n";
        echo $this->members['cersei']->name() . "\n";
        echo $this->members['cersei']->getCerseisChild()->getName();
    }
}