[PHP] Memory usage of variables in Functions/Methods

[Gerard Samuel]

The question is what happens to local variables when the code leaves a 
function/method
as far as memory is concerned.
Does it *silently* unset (free the allocated memory) the local 
variables, or does it make sense to hardcode
unset() to garbage these local variables?
Thanks

function foo()
{
   $bar = 'some large value';
   unset($bar);
}
---------
function foo()
{
   $bar = 'some large value';
}
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