Using a variable to call another variable

[Dave M G <martin@xxxxxxxxxxxxx>]

PHP List,

I have a list of variables:

$001
$002
$003
$004

And what I'd like to do is have a function which will select and return 
one of them. Something like:

public function returnVar($n)
{
return $(somehow n is made to reference the name of the variable);
}

And then in later scripts I can call anyone of the variables by saying

returnVar(001)

Or something like that.

I've been scratching my head on how to do this for a while. I thought 
the answer might lie somewhere in call_user_func(), but even if it is I 
can't determine how.

Any advice would be much appreciated.

Thank you for your time.

--
Dave M G
Ubuntu 6.06 LTS
Kernel 2.6.17.7
Pentium D Dual Core Processor
PHP 5, MySQL 5, Apache 2

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