While I agree that it makes it easier to hack in that functionality, it would still be very useful to have named parameters for functions that don't implement that functionality.

For example, fgetcsv takes parameters for delimiter, enclosure, and escape char (as of 5.3). Right now, if I want to specify a different enclosure, I'm forced to specify a delimiter even if I still want to use the default. I'd much prefer the ability to tell the function call that I want to override the enclosure and leave the delimiter alone.