PHP - Active button with CSS and PHP

<body> <h1><a rel="nofollow" href="http://www.sebastiansulinski.co.uk/web_design_tutorials/css/active_button.php" >Active button with CSS and PHP</a></h1> <p>This tutorial will explain you how to make your button (link) in the navigation active when you are on a specific page.</p> <p><a href="http://www.tutcity.com/">More Tutorials</a></p> </body>