Class function parameter not required?

[Wynder]

Greetings.. I have a class object:

class foo {

function foo($array) {
foo;
}
}

For function $foo, is there any way to specify that $array is optional to supress warnings about an argument being missing if one is not passed?

[tbach2]

my guess would be

class foo {

   function foo($array='') {
      foo;
   }
}