I’m not sure if this is exactly the same topic, but one problem I have with how
internal functions are handling arguments is how the absence of an optional
argument is treated.
I have stumbled across functions documented as functionname($arg1, $arg2 =
NULL) which behaves differently when called as functionname('something') and
functionname('something', NULL).
A lot of places in the documentation state "if omitted" about an argument.
This is a big problem when several arguments are optional and you just want to
provide a value for the last one. You cannot know if giving the default value
for the ones in between will affect the behavior.
Shouldn’t the argument parsing system treat absence the same as the default
value?
This is what happens for userland functions.
Côme
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