Exif::camera PHP Method

    public function camera()
    {
        if (!is_null($this->camera)) {
            return $this->camera;
        }
        // check for valid exif data
        if (!is_array($this->data)) {
            return null;
        }
        // initialize and return it
        return $this->camera = new Exif\Camera($this->data);
    }