HTML and PHP are indispensable and CSS is a new help in page layout and design. If you need interactive interfaces, you will need JavaScript and Flash. If you need to deal with databases, you will need jQuery, for example.
HTML5 is now the easiest and simplest language in the world, with the need for other languages according to the need and purpose of the site
HTML5 is now the easiest and simplest language in the world, with the need for other languages according to the need and purpose of the site