From the page: "This tool, written in PHP, isn't a syntax highlighter like you usually find on internet. I created this simple tool to be able to add quickly a source code (php,css,xhtml...) on my blog styled with css and xhtml 1.0 strict. Also I didn't want to see a lot of " " for each space found at the beginning of the lines, so I use only some css classes to simulate the tabs or spaces. In this way, the xhtml code is very clean and easy to read. You can see an example on my site here..."