Description:
------------
Given:
<?
function myfunc($arg1,$arg2=2,$arg3='',$arg4=false,$arg5=1)
{...}
?>
It would be nice to be able to do this:
<?
myfunc('arg1',5,,true);
?>
Which would keep the default values for arguments 3 & 5 but specify a value for argument 4.

This way, if I ever change the default value of $arg3 from '' to null, I have less code to modify.