function ch_highlight_code($matches)
 {
     global $ch_options;
     // undo nl and p formatting
     $plancode = $matches[2];
     $plancode = $this->entodec($plancode);
     $geshi = new GeSHi($plancode, strtolower($matches[1]));
     $geshi->set_encoding('utf-8');
     $geshi->set_header_type(GESHI_HEADER_DIV);
     $geshi->enable_classes(true);
     $language = $geshi->get_language_name();
     if ($language == 'PHP') {
         $geshi->add_keyword(2, 'protected');
         $geshi->add_keyword(2, 'private');
         $geshi->add_keyword(2, 'abstract');
         $geshi->add_keyword(2, 'static');
         $geshi->add_keyword(2, 'final');
         $geshi->add_keyword(2, 'implements');
     } elseif ($language == 'Bash') {
         $geshi->add_keyword(2, 'convert');
         $geshi->add_keyword(2, 'git');
     } elseif ($language == 'Vim Script') {
         $geshi->add_keyword(1, 'endfunction');
     }
     if (ch_go('ch_b_linenumber')) {
         $geshi->enable_line_numbers(GESHI_FANCY_LINE_NUMBERS);
     }
     $geshi->enable_strict_mode(ch_go('ch_b_strict_mode'));
     $geshi->set_tab_width(ch_go('ch_in_tab_width'));
     $geshi->set_overall_class('dean_ch');
     $overall_style = '';
     if (!ch_go("ch_b_wrap_text")) {
         $overall_style .= 'white-space: nowrap;';
     } else {
         $overall_style .= 'white-space: wrap;';
     }
     if ($overall_style != '') {
         $geshi->set_overall_style($overall_style, false);
     }
     return $geshi->parse_code();
 }