function foo($arg1_required, $arg2_optional="")
    if ($arg2_optional=="") {
        print "not passed";
    }
    else {
        print "explicit";
    }
}

-----Original Message-----
From: Rodent of Unusual Size [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 11, 2002 3:17 PM
To: [EMAIL PROTECTED]
Subject: [PHP] 'undef' as an argument value


An odd request..  I want to have optional function arguments
that *aren't* defined unless values are explicitly passed.  Sorta
the equivalent of

function foo($arg1_required, $arg2_optional=undef)
    if (isset($arg2_optional)) {
        print "explicit";
    }
    else {
        print "not passed";
    }
}

Something like this is possible in Perl through the 'undef'
construct; is anything like this available in PHP?
-- 
#ken    P-)}

Ken Coar, Sanagendamgagwedweinini  http://Golux.Com/coar/
Author, developer, opinionist      http://Apache-Server.Com/

"Millennium hand and shrimp!"

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