Re: reg exp to filter bad characters in filename

----- Original Message -----
From: "Hank Marquardt" <hmarq(at)yerpso.net>
To: "Richard Walker" <richardwalker(at)onebox.com>
Cc: <hwg-languages(at)hwg.org>
Sent: Wednesday, June 05, 2002 10:04 PM
Subject: Re: reg exp to filter bad characters in filename


> Oops, I missed something ... you have a '.' in your pattern,
that is a
> special regex character unless you escape it out to be literal
... wo
> make that last item in [] \.

That was throwing my regex off I think.  I thought that within
the [] everything was taken as literal.  Then again you do use
metacharacters within the [] such as \s \w so I guess any
non-alnum should theoretically be escaped.

/[^a-zA-Z_.]/ => /[^a-zA-Z\_\.]/

even.

>
> On Wed, Jun 05, 2002 at 03:32:37PM -0400, Richard Walker wrote:
> > Well done, thank you.  I wasn't sure about the use of the ^
with
> > multiple tokens in the [brackets], I guess it distributes to
each
> > token within the brackets.
> >
> > Actually though, rather than do automated cleanup of bad
> > characters I was going to bonk the user on the head with an
error
> > message so they'd be encouraged to rename their files.
> >
> > Would
> >
> > if (preg_match ('/[^a-zA-Z_.]/',$filename)) {
> >     print "BONK!  Rename that poorly named file then try
again!";
> > }
> >
> > work as well?
> >
> >
> >
> > ----- Original Message -----
> > From: "Hank Marquardt" <hmarq(at)yerpso.net>
> > To: "Richard Walker" <richardwalker(at)onebox.com>
> > Cc: <hwg-languages(at)hwg.org>
> > Sent: Wednesday, June 05, 2002 1:25 PM
> > Subject: Re: reg exp to filter bad characters in filename
> >
> >
> > > $sanitized = preg_replace('/[^a-zA-Z_]/','',$filename);
> > >
> > > I didn't test it, but that should work.
> > >
> > > On Wed, Jun 05, 2002 at 10:35:25AM -0400, Richard Walker
wrote:
> > > > Yo
> > > >
> > > > I wrote a PHP app to allow people to upload files.
> > Immediately the client
> > > > proceeds to upload files with all kinds of gunk in them,
such
> > as '+'
> > > > and ' '.
> > > >
> > > > I need a reg exp to filter out everything but
alphanumeric,
> > ., and _
> > > > characters.  I could do a nested if statement or
something
> > but I know
> > > > there's a nice terse Perl compatible solution.
> > > >
> > > > Thanks!
> > > >
> > > > --
> > > > Richard Walker
> > > > RichardWalker(at)onebox.com - email
> > > >
> > > >
> > >
> > > --
> > > Hank Marquardt <hank(at)yerpso.net>
> > > http://web.yerpso.net
> > > GPG Id: 2BB5E60C
> > > Fingerprint: D807 61BC FD18 370A AC1D  3EDF 2BF9 8A2D 2BB5
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> > > *** Web Development: PHP, MySQL/PgSQL - Network Admin:
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> > > *** PHP Instructor - Intnl. Webmasters Assn./HTML Writers
Guild
> > > *** Beginning PHP && PHP II -- Starting March 25, 2002
> > > *** See http://www.hwg.org/services/classes
> > >
> >
> >
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>
> --
> Hank Marquardt <hank(at)yerpso.net>
> http://web.yerpso.net
> GPG Id: 2BB5E60C
> Fingerprint: D807 61BC FD18 370A AC1D  3EDF 2BF9 8A2D 2BB5 E60C
> *** Web Development: PHP, MySQL/PgSQL - Network Admin:
Debian/FreeBSD
> *** PHP Instructor - Intnl. Webmasters Assn./HTML Writers Guild
> *** Beginning PHP && PHP II -- Starting March 25, 2002
> *** See http://www.hwg.org/services/classes
>


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