The code you are attempting to correct isn't broken Grant-. And your corrections can even be corrected.
You corrected this code:

if ($2 == $null || $3 == $null)

To this:

if (!$2 || !$3)

I would do it like this:

if (!$3)

Mine is better according to your little byte counter. Should I now search all the snippets and correct them?
All three of them work, so there is no reason to make an issue of it.

Keep your opinions to yourself
This is MY post Grant-!!!