How to save an SVG file drawn in the browser to a directory on the server?

Question

PHP

The script creates an SVG image, sets the Content-Type header and displays it on the page.
How can I save this image as an SVG file on the server, in addition to displaying it on the page?
The module is used for generation:
https://github.com/meyfa/php-svg
The description says that you can save the resulting SVG to a file, but I did not find anything about this in the documentation. I found only an example with SVG output to the screen:

use SVG\SVG;
use SVG\Nodes\Shapes\SVGRect;

// image with 100x100 viewport
$image = new SVG(100, 100);
$doc = $image->getDocument();

// blue 40x40 square at (0, 0)
$square = new SVGRect(0, 0, 40, 40);
$square->setStyle('fill', '#0000FF');
$doc->addChild($square);

header('Content-Type: image/svg+xml');
echo $image;

Answer 1

file_put_contents('my-image.svg', $image->toXMLString());

https://github.com/meyfa/php-svg/wiki/Outputting-S...