Add more ID of a program

Hello to all!

The Plugin is Yith Compare for Wordpress.

I have read a lot of good documentation and are days that I'm trying to solve this problem that is unsolvable for me.

The documentation says that if you want to add a fixed number of ID must use the the shortcode [yith_compare_button product = ""]

Using this code, everything works fine, for example, if I want to use the code 878 just put [yith_compare_button product = "878"] and everything works perfectly. The huge problem is when I have to add more than one ID.

I tried in every way possible and imaginable to add more than one ID and I can not find the way. Commas, colons, brackets, no, no way.

I then tried to go into PHP to try to understand where you can directly edit the script by adding it directly to them, and I think I found the correct line where to do so (correct me if I'm wrong)

public function add_product_to_compare ($ product_id) {

$ product = get_product ($ product_id = "878");

Here too the exact same problem, I can add only ONE ID, and not more than one, really do not know how to do, I ask you to help me kindness because I do not know what to invent, thank you very much.

My intention is just to add more than one ID in the same comparison program to be fixed.

PHP WordPress

Numer ID Projektu: #4856213

O projekcie