GeSHi is a Generic Syntax Highlighter for PHP taking any sourcecode and highlighting it in XHTML and CSS. GeSHi's many features include: * Support for over 120 languages * Case-sensitive or insensitive highlighting * Auto-caps/non-caps of any keyword * Function to URL conversion * Line numbering * Use of CSS classes to massively reduce the amount of outputted code. * International character set support GeSHi's features are neatly wrapped up in an easy to use class and GeSHi comes with full documentation.