null as function argumnent?

[Bas Jobsen <bas@xxxxxxxxxxxxxxxxxxxxxx>]

Hi,

I want to use a ?: statement. If not true de default function argument have to 
be used. How to do this

<?
function test($test='default')
{
echo $test;
} 
test(($value==1)?'no default':null);
?>

What do i have to pass instead of null to get default print?

Tnx,

Bas

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