unset() question

[Anon]

Hi - I assign a string to a variable in a loop. I want to initialise the variable after use.

Is it more efficient to do this:
$my_str="";

or this:
unset($my_str);

Cheers, Tony.

[Anon]

$my_str="" will just set the variable to equal "".

unset($my_str) will actually delete the variable completely removing any space it was allocated from memory.

...i think 🙂