How to Comment Out CSS

Learn how to comment out CSS code, what to watch out for, and how to not have it slow down the performance of your web pages.

How to Echo an iFrame in PHP

Trying to figure out how to echo an iframe in your PHP code? Here are the three ways to get it done, with code samples.

Do HTML Comments Affect Performance?

Leaving comments in your HTML documents makes it easier to edit and debug your code. But does it also have a negative effect on the speed of your website?

Can You Mix CSS and HTML?

Is it possible to mix HTML markup and CSS style sheets in the same document? And if the answer is yes, when is it a good idea to do so?