PHP and CSS markup language to compete in the web developing industry?

I have this frequently asked question in my mind and have been waiting that someone could answer this. In making a website, we used the term WordPress that is consists of PHP and CSS. How do you develop a high quality PHP and CSS markup language to compete in the web developing industry? I have this frequently asked question in my mind and have been waiting that someone could answer this. In making a website, we used the term WordPress that consists of PHP and CSS. How do you develop a high quality PHP and CSS markup language to compete in the web developing industry?
