Abstract Factory example in PHP

abstract_factory.php

<?php

/* Abstract Factory in PHP */

interface FactoryOS
{
    public static function createMenu() : Menu;
    public static function createButton() : Button;
}

class FactoryWin implements FactoryOS
{
    public static function createMenu() : Menu
    {
        return new MenuWin();
    }

    public static function createButton() : Button
    {
        return new ButtonWin();
    }
}

class FactoryLinux implements  FactoryOS
{
    public static function createMenu() : Menu
    {
        return new MenuLinux();
    }

    public static function createButton() : Button
    {
        return new ButtonLinux();
    }
}


interface Button
{
    public function getButtonTitle() : string;
}

class ButtonWin implements  Button
{
    public $title = "Windows Button";

    public function getButtonTitle() : string
    {
        return $this->title;
    }
}

class ButtonLinux implements Button
{
    public $title = "Linux Button";

    public function getButtonTitle() : string
    {
        return $this->title;
    }
}


interface Menu
{
    public function getMenuTitle() : string;
}

class MenuWin implements  Menu
{
    public $title = "Windows Menu";

    public function getMenuTitle() : string
    {
        return $this->title;
    }
}

class MenuLinux implements Menu
{
    public $title = "Linux Menu";

    public function getMenuTitle() : string
    {
        return $this->title;
    }
}

/* ------------------------------------------------------------------------- */

function createGUIInterface(FactoryOS $f)
{
    $menu = $f::createMenu();
    $button = $f::createButton();

    echo $menu->getMenuTitle() . "<br/>";
    echo $button->getButtonTitle();
}


createGUIInterface(new FactoryWin);
echo "<br/>---------------------------<br/>";
createGUIInterface(new FactoryLinux);