Rotational blurs an image.
I have no idea how this is different from radialBlurImage. radialBlur is deprecated in ImageMagick
I have no idea how this is different from radialBlurImage. radialBlur is deprecated in ImageMagick
function rotationalBlurImage($image_path, $rotation_angle)
{
    $imagick = new \Imagick(realpath($image_path));
    $imagick->rotationalBlurImage($rotation_angle);
    header("Content-Type: image/jpeg");
    echo $imagick->getImageBlob();
}