GeSHi

<?php

    /**

     * Easy way to highlight stuff. Behaves just like highlight_string

     *

     * @param string The code to highlight

     * @param string The language to highlight the code in

     * @param string The path to the language files. You can leave this blank if you need

     *               as from version 1.0.7 the path should be automatically detected

     * @param boolean Whether to return the result or to echo

     * @return string The code highlighted (if $return is true)

     * @since 1.0.2

     */

    function geshi_highlight($string, $language, $path = null, $return = false) {

        $geshi = new GeSHi($string, $language, $path);

        $geshi->set_header_type(GESHI_HEADER_NONE);

        if ($return) {

            return '<code>' . $geshi->parse_code() . '</code>';

        }

        echo '<code>' . $geshi->parse_code() . '</code>';

        if ($geshi->error()) {

            return false;

        }

        return true;

    }

}

?>