PHP multiple new lines

Question

I\'m a little stuck. How do I remove multiple newlines which are in a row with one newline. There could be anything up to 20 newlines next to each other. For example

Answer 1

$fixed_text = preg_replace("\n+", "\n", $text_to_fix);

This should do it, assuming that the consecutive newlines are truly consecutive and don't have any whitespace (tabs, spaces, carriage returns, etc...) between them.