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Subject: Re: [PHP-DEV] is_digits() and digits type
From: smalyshev@gmail.com (Stanislav Malyshev)

Hi!

>  - is_digits() and digits type for digits only inputs(integer like string)
>  - is_numeric() and numeric type for float like string

This is not what types are in PHP, and not what they should be, IMO. If
you want to assign arbitrary checks to a variable, I would suggest using
a class with a suitable constructor. If you think it's too slow (meaning
you are doing very heavy in-memory data processing and nothing else),
make an extension - it would be roughly the same speed as native PHP
types. If you want it to be extensible - then you may be looking for
something like pre/post conditions and DbC, but this is another story
for which we need proper RFCs, etc.

However, calling random combination of native types, objects and string
constraints "type" because somewhere there's use case for it does not
look like a good design for a language. It's too random and ad-hoc.
-- 
Stas Malyshev
smalyshev@gmail.com