cleanse html, js, style from form input

function cleanse($input){
  $search = array('@]*?>.*?@si', 		// cleanse js
                 '@]*?>.*?@siU',    		// cleanse style
                 '@<[\/\!]*?[^<>]*?>@si', 	// cleanse html
                 '@@'         			// cleanse CDATA/multi-line comments
  );
  $text = preg_replace($search, '', $input);
  $text = trim($text);				// cleanse "whitespace" on left or right
  $text = preg_replace('/\\s{2,}/',' ',$text);  // cleanse "whitespace" excessive spaces
  return $text; 
}