Posted by cmills28 on 07/05/06 00:23

I'm using php 4.3, and I"m wondering when is it a good idea to use this
unset() function to free a variable?

Also, what happens internally when a variable is set in one place, then
reset in another -- for instance:

$a = "some string";

and later on in the script I have:

$a = "a different string";

What happens to "some string" -- is it still floating around in memory
(without any references to it)? Or is it garbage collected & memory
freed? Should I use unset($a) to free "some string" before resetting
$a to something different?

Thanks.
Chris

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