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Posted by Rik on 07/19/06 10:32
Bosconian wrote:
> "Bosconian" <nobody@nowhere.com> wrote in message
> news:a9adnRNNhaRVJSDZnZ2dnUVZ_vmdnZ2d@comcast.com...
>> I need a regular expression to validate characters for a given file
>> name. I want to limit valid characters to the following:
>>
>> a-z
>> A-Z
>> 0-9
>> underscores
>> hyphens
>> white spaces
>>
>> The file name must end with a period and a 3-character extension.
>>
>> I also want to prevent repeat underscores, hyphens and white spaces.
>> Example: "__", "--" and " " would all be invalid.
>>
>> I found this example:
>>
>> ^[a-zA-Z0-9_\s-]+$
>>
>> This comes close, but it allows repeat underscores, hyphens and white
>> spaces. It also uses "\s" which allows carriage returns, linefeeds,
>> tabs, etc.
I thought you wanted to allow whitespaces?
>> Any help would be greatly appreciated.
>>
>>
>
> I almost have it:
>
> $pattern = "|[\wa-zA-Z0-9\-_]+\.[a-zA-Z0-9]{3}$|";
If you eant a WHOLE string to match, enchor it with both ^ and $
/^([a-z0-9]+[\040_\-]?)*\.[a-z]{3}$/i
Grtz,
--
Rik Wasmus
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