php: replacing double with

Question

i use nicEdit to write RTF data in my CMS. The problem is that it generates strings like this:

hello first line

this is a second line<         


        

Answer 1

This will work even if the two
s are on different lines (i.e. there is a newline or any whitespace between them):

function replace_br($data) {
    $data = preg_replace('#(?:\s*?){2,}#', '
', $data);
    return "
$data
";
}