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[nycphp-talk] Re: PHP_SELF problems

edward potter edwardpotter at gmail.com
Fri Dec 29 15:05:57 EST 2006


I have not really followed this discussion, but when i see something like this:
"$_SERVER['SCRIPT_NAME'] will contain the full _filesystem_ path,
which is not what we're after."

Can you just do a 1 line regex and pull out what you need? And you are all set.

:-) ed

On 12/29/06, Dan Cech <dcech at phpwerx.net> wrote:
> Michael Sims wrote:
> > On Tuesday 26 December 2006 5:11 pm, Joseph Crawford wrote:
> >> Chris,
> >>
> >> do you suggest hardcoding the filenames even when referencing the same
> >> file that is executing?
> >
> > There was a long thread about this in July 2005.
> >
> > Executive summary: PHP_SELF intentionally includes extra URL garbage (or
> > valuable URL variables, take your pick) tacked on by the user.  Don't use
> > it without knowing what it does.
> >
> > Here's what you get when you hit the URL:
> >
> > http://example.com/info.php/testing1?testing2 :
> >
> > _SERVER["REQUEST_URI"]         /info.php/testing1?testing2
> > _SERVER["PHP_SELF"]    /info.php/testing1
> > _SERVER["SCRIPT_NAME"]         /info.php
> >
> > Get it?  If you don't want that extra stuff tacked on by the user, use the
> > correct _SERVER variable.  If you use REQUEST_URI or PHP_SELF, be aware the
> > user can affect the contents of that variable.  99% of the time, you want
> > SCRIPT_NAME, not PHP_SELF.
>
> Actually, I have recently come across a 'fly in the ointment' for this
> approach.  If you're running php as a cgi, $_SERVER['SCRIPT_NAME'] will
> contain the full _filesystem_ path, which is not what we're after.
>
> I'm not 100% sure what the solution to this problem is.  Right now the
> only thing I can think of is to try and figure out the common part of
> PHP_SELF and SCRIPT_NAME, so as to drop both the extra filesystem info
> and any url garbage, but that seems pretty fragile to me.
>
> If anyone has a good solution or even any suggestions I'd love to hear them.
>
> Dan
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