imagine i have 2 lists, just plain text.
i want to know different things:
I. all list-entries which are in both lists
II. all list-entries which are NOT in list 1 BUT in list 2 (= only in list 2).
listcheck has to be NOT case sensitive.
has to handle email-adresses to (so make sure the handler understands @).
please deliver a website (php) where i can paste 2 lists in (for example in 2 textareas).
then let me choose what i want to know (I. or II.) and a submit-button.
as a result show me a list with the result. dont need to download that list or so,
just show results on the website, so i can copy/paste them into any file.