It's not a bug. The regex is simply wrong. The ereg() functions are
POSIX 1003.2 compliant. Read this:
A bracket expression is a list of characters enclosed in
`[]'. It normally matches any single character from the
list (but see below). If the list begins with `^', it
matches any single character (but see below) not from the
rest of the list. If two characters in the list are sepa
rated by `-', this is shorthand for the full range of
characters between those two (inclusive) in the collating
sequence, e.g. `[0-9]' in ASCII matches any decimal digit.
It is illegal- for two ranges to share an endpoint, e.g.
`a-c-e'. Ranges are very collating-sequence-dependent,
and portable programs should avoid relying on them.
To include a literal `]' in the list, make it the first
character (following a possible `^'). To include a lit
eral `-', make it the first or last character, or the sec
ond endpoint of a range. To use a literal `-' as the
first endpoint of a range, enclose it in `[.' and `.]' to
make it a collating element (see below). With the excep
tion of these and some combinations using `[' (see next
paragraphs), all other special characters, including `\',
lose their special significance within a bracket expres
sion.
Nowhere does it say that \- is a valid way to get a literal - inside a
bracketed expression.
-Rasmus
On Tue, 14 May 2002, Chand wrote:
> hey,
>
> i've come across a bug these past few days in regexps, i've been getting mad about
>this. I looked around in the Bug Database and i found it :
>
> http://bugs.php.net/bug.php?id=11461
>
> it's from 4.0.6, dated almost a year and still hasn't been corrected and is not even
>assigned
> Any ideas why this has been put off ? It still 'works' on php 4.2.0RC4, haven't
>tried further..
>
> Thanks for any insight as to why this hasn't been solved yet.
>
> Later
>
> --
> Chand
>
> "640K ought to be enough for anybody."
> Bill Gates, 1981
>
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