Just FYI, I use (!$2) out of habit; it's a shortcut, and actually means if ($2 == $null) .
Just to be
really correct:
if (!$2)is exactly the same as
if (($2 == $null) || ($2 == 0) || ($2 == $false))More to the point: yes, better use $1- or $regex (if you're familiar with it)
