Understanding the role of HTML code helps developers understand what that code is doing. Semantic HTML tells developers (or search engines) what the purpose of that code is.

Most top-ranking websites fail HTML validation. Google explains why perfect code isn’t required, and what matters instead.

You can use PHP to position HTML elements. Here's how. By Matt Rotter, Charity Kahn, and Paul Anderson. ... offsetting them from the previous element in the HTML code.

Use CSS code to style your site headers with borders and other design elements. HTML and CSS use a box model, which means that page elements include margins, padding, background colors and ...