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Cc: <internals@lists.php.net>, "Andrei Zmievski" <andrei@php.net>
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Date: Fri, 10 Nov 2006 11:10:22 +0100
To: Matt Wilmas <php_lists@realplain.com>
Subject: Re: [PHP-DEV] Unicode chars allowed in numbers?
From: andrei@gravitonic.com (Andrei Zmievski)

> Hi Andrei, et al.,
>
> I was just looking at README.UNICODE, regarding interpretation of  
> numbers:
> "we restrict numbers to consist only of ASCII digits," and "Numeric  
> strings
> are supposed to adhere to the same rules."  Is it correct to take  
> that to
> mean only UChar's with values from '0'-'9'/0x30-0x39 (and 'a'-'z'
> equivalents for bases > 10)?

Correct.

> I ask because in zend_u_strtol(), HANDLE_U_NUMERIC() for array  
> keys, etc.,
> the u_digit() function is used, which also allows non-ASCII, higher- 
> value
> digit characters, doesn't it?  But then in is_numeric_unicode(), when
> checking for hex numbers, the ASCII values '0' and 'x' are used,  
> which is
> what I'd expect after reading README.UNICODE.

You're correct here again, u_digit() should not be used there.

-Andrei