> I think single quotes is right because you don't want PHP to escape
> the characters...the escape is for regex, not PHP
In fact, we're neither correct, I was thinking of PCRE, but this is
POSIX regexes which I'm not familiar with.
>From the POSIX man pages:
"To include a literal `]' in the list, make it the first character
(following a possible `^'). To include a literal `-', make it the first
or last character, or the second 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 exception of
these and some combinations using `[' (see next paragraphs), all other
special characters, including `\', lose their special significance
within a bracket expression"
Which seems to tell us it can't be (and doesn't need to be) escaped at
all. I'll stick with PCRE, they're binary safe.
I would try removing the backslash and moving the hyphen to be the last
character in the range (after the full stop).
> On Jan 19, 2008 9:44 AM, Niel Archer <not@xxxxxxxxxx> wrote:
> > Hi
> >
> > > OK, I don't think I searched the web hard enough. I've not found a
> > > definitive explanation, but I think the warning has something to do
> > > with the dash symbols (\-) within the square brackets. Removing them -
> > > changing them to the regular expression below - removes the warning
> > >
> > > '^[a-zA-Z0-9_.]+@[a-zA-Z0-9]+\.[a-zA-Z0-9.]+$'
> >
> > > Question is now, how am I supposed to match dash symbols?
> >
> > The problem is that you included the "\-" within SINGLE quotes. Escaping
> > a character only works within double quotes. Go back to your original
> > but substitute the ' for " around the expression. Like this:
> >
> > define("EMAIL_RE", "^[a-zA-Z0-9_\-.]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-.]+$");
> >
> > >
> > > In one thread I read advised preg functions using the ereg functions.
> > > I had ago with this, putting back in the dashes and changing the
> > > regular expression to a perl RE:
> > >
> > > '/^[a-zA-Z0-9_\-.]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-.]+$/'
> > >
> > > No warnings this time and it appears to work. I still welcome any
> > > feedback on ereg if anyone wants to give any.
> >
> > --
> > Niel Archer
> >
> >
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> >
> >
>
>
>
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> ts2do
>
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Niel Archer
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