PHP multi-file upload, with JPG conversion and resizing?

Question

PHP

Hello. I'm trying to do a multi-file upload with conversion to JPG and image resizing. It turns out - horror that, a big and terrible code, the reliability of which I very much doubt. I won’t lie, I didn’t learn how to work with images, because I did not expect that I had to (still do not see any other use than downloading files).
Maybe someone already wrote such a function? Share?
I just want to upload images, immediately reduce them, convert them to JPG and give the file name based on the last ID from the MySQL database :)

Answer 1

image.intervention.io