Overloading function/constructor?

Lo all,
I have try overloading function/constructor with numbers of arguments but it doesnt work. Anybody knows why? Thanx in advace!

for instance,
function foo($arg_1) {
...
}

function foo($$arg_1, $arg_2) {
...
}

php keeps calling "function foo($$arg_1, $arg_2)" even when i only pass one argument in. any idea?

I'm pretty sure PHP isn't capable of function overloading ala C++ but there's a workaround that may (or may not) work for you depending on your needs

set $arg2 to some default value using the = operator in your function declaration

function foo($arg1, $arg2="")
{
....
}

that way you can call
foo($arg1);

or

foo($arg1, $arg2);

I suppose you could run a test on $arg2 to see if it exists and do something with it - probably not what you're looking for but that's the best I've got

My sentiments exactly.