Thanx for your tip, it works perfectly!

I have a question:
My problem is to have multiples galleries on a same post – each galleries must show only their own images (from ids in the shortcode).
So, do you have any idea to assign to each galleries a different id ?
I thought about a “while” or “foreach” but honestly i dont know hot to put it in the function file!
How to create an id per gallery?

Thanx for helping!