[mzmm]

Originally Posted by 1v4n0

How about a regex that finds everything that has the structure of

<AAAwhatever></AAA>

i.e. all empty html elements.

Or, even better, all elements that either are empty or that contain just a space.

i use something like this to catch paragraph tags, either empty or containing only whitespace. it also catches nested tags, so things like

<p><i><b><br/></b></i></p>

(?s)<p[^>]*?>\s*?(?:<\w[^>/]*?>)*?\s*?(?:&nbsp;|*|<br(?:\s|\s/|/)?>)*?\s*?(?:</\w[^>/]*?>)*?\s*?</p>

Originally Posted by 1v4n0

EDIT Looks like this one is working, though I'm not entirely sure why.

<[^/>]+>[ \n\r\t]*</[^>]+>

because it's looking for

<[^/>]+>

an opening and closing bracket containing one or more of anything except closing brackets or forward slashes

[ \n\r\t]*

followed by none or more spaces, newlines or tabs

</[^>]+>

followed by an opening and closing bracket containing one or more of anything except closing brackets or forward slashes