[PHP] blank function parameters

[Giles Roadnight]

Hello
 
If I defined a function with 4 parameters but only pass 3 I get an
error. Is there anyway around this?
 
I want to be able to set the missing parameter to a default value if it
is not passed which works ok but How do I get rid of the error message?
 
Thanks
 
Giles Roadnight
http://giles.roadnight.name