In PHP, what is the differences between NULL and setting a string to equal 2 single quotes

Question

I used to set things like this when I wanted blank values.

$blankVar = \'\';

Then after some months, I decided this looked better and had a

Answer 1

Well, it's one thing how nice each approach looks, but the main difference is that one is an empty string and the other is an uninitialized variable (null)