Hi everyone,

I've already created a php site that has the following doctype:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

I need to now add some html5 code but wondered if I need to change the doctype in order to do this. If yes, how would I do this?

I wondered if anyone could give me some advice?

Thanks in advance