Re: preg_match help please

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On Thu, 08 Sep 2005 16:36:36 +0100, Steve Turnbull wrote:

> On Thu, 08 Sep 2005 09:15:03 +0100, 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
>> 
>> Thanks
>> Steve
> 
> 
> One more thing (I have tried researching myself and reading the o'rielly
> book, but I need fairly swift solutions)...
> 
> How would I check for this scenario;
> 
> Two commas, which MAY have, but don't always have a value between, but
> the commas must ALWAYS be there - i.e.
> 
> var1,var2,var3
> var1,var2,
> var1,,
> 
No matter now - sorted. I hadn't read the final reply before I posted this
one

Thanks again

Steve

> Cheers
> Steve

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