[RCD] HTML icon entity lookbehind regex

Can you not do {min,max} in the lookbehind regex? ie, instead of this:

$entity = '(?<!&'              . '[a-zA-Z0-9]{2}' . '|' . '#[0-9]{2}' . '|'              . '[a-zA-Z0-9]{3}' . '|' . '#[0-9]{3}' . '|'              . '[a-zA-Z0-9]{4}' . '|' . '#[0-9]{4}' . '|'              . '[a-zA-Z0-9]{5}' . '|'              . '[a-zA-Z0-9]{6}' . '|'              . '[a-zA-Z0-9]{7}'              . ')';

Do this:         $entity = '(?<!&'              . '[a-zA-Z0-9]{2,7}' . '|' . '#[0-9]{2,4}'             . ')';

Or is that the assertion format restriction you mention in the comment?

-Brad

List info: http://lists.roundcube.net/dev/ BT/aba52c80