How to replace one or two consecutive line breaks in a string?

Question

I\'m developing a single serving site in PHP that simply displays messages that are posted by visitors (ideally surrounding the topic of the website). Anyone can post up to

Answer 1

Something like

preg_replace('/(\r|\n|\r\n){2,}/', '

', $text);

should work, I think. Though I don't remember PHP syntax exactly, it might need some more escaping :-/