my new mod_rewrite code

My mod_rewrite code used to be

RewriteRule ^p(.*) o.php?i=$1

Bu I changed it to

RewriteRule ^([0-9]+) o.php?i=$1

This means

instead of

nowiwi.com/p1

I can simply do

nowiwi.com/1

THE PLUS SİGN means..

CAN BE MORE THAN 1 DİGİT.