garbage collection/memory leak questions

[calmchess]

I'm passing variables to a function via paramaters but when the variables get passed i'm renaming the passed variables to other variable names.......see below...........my question is by doing this is this creating refrences to more variables than necessary or are the refrences to the old variables released?garbage collector to collect the old variables?.....i'm wondering because i want the garbage collector to collect the old variables....could somebody plz shed some light on avoiding memory leaks in php??

[trq]

There are no such things as memory leaks in php.

[rarebit]

if you have old variables then reinitialise them, unset or reset them, but i aint seen no malloc around here!