resize image from existing image?

[wmgilligan]

I have gdimage of various options all working by pulling a blob from a database. I can then convert, display, resize, etc.
BUT
Now I want to do this from an actual jpg on the server (Amazon S3). Is this possible?
I need to resize so that pulling the image up on a cell connection is not slow and some images are rather fat...

Thanks,

[ILoveHostasaurus]

Probably easier to just add Cloudflare's $20/mo plan in front with the image optimziation features enabled, including on the fly webp conversion. Manipulating images and trying to serve the right one to the right client is a moving target that typically isn't worth the effort given the cost of easier options that remain up to date and do it for you.

[wmgilligan]

Thanks - I had not considered that since I already had the gd stuff working. Will take a good look at it.