First, your question is purely PHP, I do not see a relationship with WordPress.
If you want to link the two variables, you must use what is called: Passing by reference
In your case :
$first = & $second
First, your question is purely PHP, I do not see a relationship with WordPress.
If you want to link the two variables, you must use what is called: Passing by reference
In your case :
$first = & $second