How pass empty or nothing to a default parameter for a function?

[someguy321]

If I have a parameter that has a default value, how do I pass nothing such that it uses the default value? Passing NULL does not work.

 

function test($to = "test@test.com", $from)
{
echo $to . "<BR>" . $from;
}

//This will NOT show "test@test.com" but instead an empty line
test( NULL, "fake@fake.com" );

[mikosiko]

Examples #3 and  #4... pay special attention to note before example #5 and then #6

http://php.net/manual/en/functions.arguments.php