GeSHi is a generic syntax highlighter for PHP that takes any source code and highlights it in XHTML and CSS. It features case-sensitive or insensitive highlighting, auto-caps/non-caps of any keyword, an unlimited scope for styling, the use of CSS in which almost any aspect of the source can be highlighted, the use of CSS classes to massively reduce the amount of output code, function-to-URL capabilities, line numbering, and much more. Over 50 languages are supported, including Java, C, PHP, HTML, CSS, SQL, Pascal, C++, XML, ASP, and ASM.