On 08 September 2005 09:15, Steve Turnbull wrote:
> On Thu, 08 Sep 2005 19:27:49 +1200, Jasper Bryant-Greene wrote:
>
> > Steve Turnbull wrote:
> > > I am trying to find a regular expression to match a variable,
> > > what I think should work (but doesn't) is;
> > >
> > > preg_match ('^/[\w],[\w],/', $variable)
> > >
> > > The $variable MUST contain an alpha-numeric string, followed by a
> > > comma, followed by another alpha-numeric string, followed by
> > > another comma followed by (but doesn't have to!!) another
> > > alpha-numeric string followed by nothing.
> > >
> > > I realise my regex above doesn't allow for the last 'followed by
> > > nothing', but to me it looks like it should match the first part
> > > of the string up to the last comma?
> >
> > Something like
> >
> > '/^\w+,\w+,\w*$/'
> >
> > maybe? (untested)
> >
> > http://php.net/reference.pcre.pattern.syntax
>
> Thats got me a lot further - thanks
>
> I reduced it slightly to '/^\w+,\w+,' because at the end there is the
> possibility of an alpha-numeric character(s) OR nothing at
> all with the
> exception of a possible line break (note possible)
>
> It's the 'possibly nothing at all' which I am slightly stuck on
The * takes care of that -- it means 0 or more of the preceding entity.
Cheers!
Mike
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