PHP: Match HTML/XML tag with regex

gistfile1.aw

function get_tag( $tag, $xml ) {
  $tag = preg_quote($tag);
  preg_match_all('{<'.$tag.'[^>]*>(.*?)</'.$tag.'>.'}',
                   $xml,
                   $matches,
                   PREG_PATTERN_ORDER);

  return $matches[1];
}
// source http://www.catswhocode.com/blog/15-php-regular-expressions-for-web-developers