Unfortunately that fails for '<p> ONE <p> TWO features: <ul> THREE <p>'.

You can fix this by making the engine go one char at a time:   /(<p> )((?:(?!<p>).)*)(features: <ul>)/i Hope I've helped,
ihb

Update:
Just for fun:   /(<p> )(?>(.*?)((<p>)|features: <ul>))(?(4)(?!))/i

In reply to Re: Re: Lookahead assertion confusion by ihb
in thread Lookahead assertion confusion by steves

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