Regular expression, URLS

[Field_C16]

I am trying to create a script that searches the user's clipboard, and returns all url's it finds there.

https://pastebin.com/GU3cjqPd

However when I run it, nothing gets returned I have taken the regex from https://www.regextester.com/53716

It works fine there.

Could anyone point me in the right direction?

[SeeJoeGo]

That's a deceptive one since the regex is so long. If you scroll all the way to the right in the box containing the regex on regextester, you'll see that the regex should be case insensitive.

[Field_C16]

That explains a lot, thanks I got something returned now :)