Use regex to find specific string not in html tag

Question

I\'m having some difficulty with a specific Regex I\'m trying to use. I\'m searching for every occurrence of a string (for my purposes, I\'ll say it\'s \"mystring\") i

Answer 1

This should do it:

(?]*)_mystring_

It uses a negative look behind to check that the matched string does not have a < before it without a corresponding >