Example

function setClipPath($strokeColor, $fillColor, $backgroundColor)
{
    $draw = new \ImagickDraw();
    $draw->setStrokeColor($strokeColor);
    $draw->setFillColor($fillColor);
    $draw->setStrokeOpacity(1);
    $draw->setStrokeWidth(2);

    $clipPathName = 'testClipPath';

    $draw->pushClipPath($clipPathName);
    $draw->rectangle(0, 0, 250, 250);
    $draw->popClipPath();
    $draw->setClipPath($clipPathName);
    $draw->rectangle(100, 100, 400, 400);

    $imagick = new \Imagick();
    $imagick->newImage(500, 500, $backgroundColor);
    $imagick->setImageFormat("png");

    $imagick->drawImage($draw);

    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}