How to wrap each new line in textarea with li tags? PHP

Question

I have a textarea form field where users will put URL\'s separated by a new line. Would it be possible to wrap each line from this textarea field with < li > tags?

So

Answer 1

$textareaData = '
'.str_replace("\n","
\n
",trim($textareaData,"\n")).'
';

EDIT

Modified to get rid of all blank lines as well:

$textareaData = '
'.str_replace(array("\r","\n\n","\n"),array('',"\n","
\n
"),trim($textareaData,"\n\r")).'
';