Hello everyone,
Am new to php and have run into a problem while reading my book... can anybody tell me 
what does this mean:

foreach($invoice as $number => $pppno)

and also this:

while(list($k,$v,) = each($a))

I do understand for loops and while loops but this is a bit confusing...do you haev 
any links I can read up on these?

Thanks in advance,
-Karin Cooke.

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