Remove excessive line returns

Question

I am looking for something like trim() but for within the bounds of a string. Users sometimes put 2, 3, 4, or more line returns after they type, I need to sanitize this inp

Answer 1

Finally managed to get it, needs preg so you are using the PCRE version in php, and also needs a \n\n replacement string, in order to not wipe all line endings but one:

  $body = preg_replace("/\n\n+/", "\n\n", $body);

Thanks for getting me on the right track.