Posted by Jerry Stuckle on 10/07/06 20:57

Colin Fine wrote:
> Seb wrote:
>
>>
>> usenet+2004@john.dunlop.name wrote:
>>
>>> Seb:
>>>
>>>> I am trying to find the right regular expression which would only
>>>> validate a URL with a given number of folders.
>>>
>>> URLs don't have, or refer to, folders. The parts in between the
>>> slashes in URL paths are called path segments, and they might or might
>>> not correspond to a part of a filesystem.
>>>
>>>> http://www.abc.com/folder/page.htm --> Valid (4 slahes)
>>>>
>>>> http://www.abc.com/folder/subfolder/ --> not valid (5 slashes)
>>>>
>>>> Basically, any URL not made of 4 slahes would be invalid.
>>>
>>> Count the number of slashes in the string.
>>>
>>>> http://www.abc.com/folder/subfolder --> would also be invalid
>>>
>>> How would you distinguish that URL from your first example?
>>>
>>> Now you see the problems arising from the confusion of URL paths and
>>> filesystem paths.
>>>
>>> --
>>> Jock
>>
>>
> > Thanks.
> >
> > I guess all my actual files would be file extensions (.htm etc) whereas
> > a path segment wouldn't.
> >
> > The question was around which regular expression I can use to access
> > something with 4 slashes, and which does not finish with ".***" or
> > ".****".
> >
> > Thanks,
> > Seb
>
> If that is indeed what you need (and assuming you mean 'does', not 'does
> not'),
> preg_match ('|^http://[^/]+/[^/]+/[^/.]+.[^/.]{3,4}$|', $string)
> will do it.
>
> But you should be aware that there's nothing in the URL RFC that says
> you can't have a path like:
>
> www.abc.com/my.bit/next.bit
>
> Unless you have control over the format of valid URL's, you are not
> entitled to assume that xxx.yyy is the final part of a URL path.
>
> Incidentally, don't top-post if you don't want to bring down the Wrath
> of Jerry Stuckle. I've fixed yours.
>
> Colin

Colin,

What do you mean "wrath"? I ask very politely, and generally only when
answering a question.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

[Back to original message]