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

Try this one:

$str = "Hello\n\n\n\n\nWorld\n\n\nHow\nAre\n\nYou?";
$str = preg_replace("/\n+/", "\n", $str);
print($str);