I have seen lots of questions about this topic and all of them were asking whether someone, who wants to use PHP for "building web pages", should learn HTML first, or not?
Most of the answers said yes, because most of the time you make web page with both PHP and HTML (and maybe CSS).
However, if I just want to use PHP for contacting to My Database (for example MySQL) and nothing more, should I first learn any HTML or CSS, or not?