/**
* compare two HTML strings
*
* @param string original content
* @param string updated content
* @return an ASCII string
*/
public static function &hdiff(&$original, &$updated)
{
global $context;
// preserve HTML tags
$old_tokens = Scripts::hbreak($original);
$new_tokens = Scripts::hbreak($updated);
// do the job
$output =& Scripts::sdiff($old_tokens, $new_tokens);
return $output;
}
