Why does the site give krakozyabry instead of webp via a direct link?

Question

PHP

Hello. On the site, the php gd image handler creates a webp.

imageCreateFromJpeg(); (или imageCreateFromPng / imageCreateFromGif в зависимости от исходного файла)
imageWebp();

Images on the site are displayed correctly, everything is displayed.
But when you open the photo via a direct link, this is the situation:

Answer 1

header('Content-Type: image/webp');
stick before the output
PS: GD disgustingly generates WEBP, imagick is better or vips is even better

Answer 2

The web server has no mime-type configured for webp, add to the config