/**
* @see \wcf\system\bbcode\highlighter\Highlighter::highlightKeywords()
*/
protected function highlightKeywords($string)
{
$string = parent::highlightKeywords($string);
// find tags
$regex = new Regex('<(?:/|\\!|\\?)?[a-z0-9]+(?:\\s+' . self::XML_ATTRIBUTE_NAME . '(?:=[^\\s/\\?&]+)?)*(?:\\s+/|\\?)?>', Regex::CASE_INSENSITIVE);
$string = $regex->replace($string, new Callback(function ($matches) {
// highlight attributes
$tag = Regex::compile(XmlHighlighter::XML_ATTRIBUTE_NAME . '(?:=[^\\s/\\?&]+)?(?=\\s|&)', Regex::CASE_INSENSITIVE)->replace($matches[0], '<span class="hlKeywords2">\\0</span>');
// highlight tag
return '<span class="hlKeywords1">' . $tag . '</span>';
}));
return $string;
}