Editing Bridge pattern (section)

=== PHP ===
<syntaxhighlight lang="php>
interface DrawingAPI
{
    function drawCircle($x, $y, $radius);
}

class DrawingAPI1 implements DrawingAPI
{
    public function drawCircle($x, $y, $radius)
    {
        echo "API1.circle at $x:$y radius $radius.\n";
    }
}

class DrawingAPI2 implements DrawingAPI
{
    public function drawCircle($x, $y, $radius)
    {
        echo "API2.circle at $x:$y radius $radius.\n";
    }
}

abstract class Shape
{
    protected $drawingAPI;

    public abstract function draw();
    public abstract function resizeByPercentage($pct);

    protected function __construct(DrawingAPI $drawingAPI)
    {
        $this->drawingAPI = $drawingAPI;
    }
}

class CircleShape extends Shape
{
    private $x;
    private $y;
    private $radius;

    public function __construct($x, $y, $radius, DrawingAPI $drawingAPI)
    {
        parent::__construct($drawingAPI);
        $this->x = $x;
        $this->y = $y;
        $this->radius = $radius;
    }

    public function draw()
    {
        $this->drawingAPI->drawCircle($this->x, $this->y, $this->radius);
    }

    public function resizeByPercentage($pct)
    {
        $this->radius *= $pct;
    }
}

class Tester
{
    public static function main()
    {
        $shapes = array(
            new CircleShape(1, 3, 7,  new DrawingAPI1()),
            new CircleShape(5, 7, 11, new DrawingAPI2()),
        );

        foreach ($shapes as $shape) {
            $shape->resizeByPercentage(2.5);
            $shape->draw();
        }
    }
}

Tester::main();
</syntaxhighlight>

Output:
 API1.circle at 1:3 radius 17.5
 API2.circle at 5:7 radius 27.5