Regex - I only want to match the start tags in regex

Question

I am making a regex expression in which I only want to match wrong tags like:

*some text here, some other tags may be here as well but no ending \'p\' tag* &

Answer 1

I know this isn't likely (or even html-legal?) to happen in this case, but a generic unclosed xml-tag solution would be pretty difficult as you need to consider what would happen with nested tags like

OUTER BEFORE
INNER
OUTER AFTER

I'm pretty sure the regular expressions given so-far would match the second

there, even though it is not actually an unclosed

.