PHP? ???? ?? ?? ????? ???? ??? ??? ??? ???? ??

?? ??? ??(Simple Factory)? ??? ????? ????? ?? ????? ?? ?? ????? ??? ? ?? ?? ?? ?????. ??? ??? ??? ?? ?????? ?? ??? ????? ??? ??? ?? ???? ???? ???? ? ?? ?? ?????. ? ????? ?? ?? ????? ???? ?? PHP? ???? ??? ??? ??? ???? ??? ????. ?? Simple Factory ??? ?? ??? ??? ?????.

??? ??? ??? ?? ??? ??? ????.

• Factory: ??? ?? ?? ????? ???? ??? ??????. ??? ????? ?? ??? ?? ??? ?????.
• ??: ?? ?? ???, ?? ?? ??? ?? ??????. ?? ??? ?? ???? ?? ??? ?????.
• ConcreteProduct: ?? ?? ????? ??? ???? ?? ????????. ?? ?? ???? ??? ???? ?????.

?? PHP? ???? ??? ??? ??? ???? ?? ?? ????? ???? ??? ???? ??? ??? ?????.

??, ??? ??? ???? ?? ?? ??? calcArea()? ???? ?? ?? ??? Shape? ????.

abstract class Shape {
    abstract function calcArea();
}

?? ?? ?? ?? ??? Shape?? ?? ???? ?? ??? calcArea()? ???? ???? ?? ??? Rectangle ? Circle? ????.

class Rectangle extends Shape {
    private $width;
    private $height;

    public function __construct($width, $height) {
        $this->width = $width;
        $this->height = $height;
    }

    public function calcArea() {
        return $this->width * $this->height;
    }
}

class Circle extends Shape {
    private $radius;

    public function __construct($radius) {
        $this->radius = $radius;
    }

    public function calcArea() {
        return 3.14 * $this->radius * $this->radius;
    }
}

????, ???? ????? ???? ???? ?? ?? ??? ???? ???? ??? ??? ShapeFactory? ?????.

class ShapeFactory {
    public static function createShape($type, $params) {
        switch ($type) {
            case 'Rectangle':
                return new Rectangle($params['width'], $params['height']);
            case 'Circle':
                return new Circle($params['radius']);
            default:
                throw new Exception('Invalid shape type');
        }
    }
}

????? ??? ??? ??? ???? ?? ?? ??? ?? ? ????. ??? ?????.

$rectangle = ShapeFactory::createShape('Rectangle', ['width' => 2, 'height' => 3]);
$circle = ShapeFactory::createShape('Circle', ['radius' => 5]);

echo 'Rectangle area: ' . $rectangle->calcArea() . PHP_EOL;
echo 'Circle area: ' . $circle->calcArea() . PHP_EOL;

? ??? ???? ??? ?? ??? ?????.

Rectangle area: 6
Circle area: 78.5

? ??? ?? ??? ??? ??? ???? ?? ?? ????? ?? ??? ? ??? ?? ? ? ????. ??? ????? ?? ??? ???? ???? ??? ?? ??? ?? ?? ????? ?? ? ??? ?? ?? ???? ?? ?? ??? ?????.

?????, ?? ??? ??? ?? ???? ????? ???? ??? ????, ??? ??? ??? ?? ?? ??? ???? ?? ????? ?????. ??? ??? ??? ?????? ??? ????? ????? ?? ????? ??? ?? ???? ???? ???? ? ????.

? ?? ??? ??? ??? ???? ???? ? ??? ??? ????. ??? ?? ? PHP ?????? ?? ??? ??? ?? ??? ?? ??? ??? ????.

? ??? ?? ?? ????? ???? ?? PHP? ???? ??? ??? ??? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!