Re: [PHP] Deleting multiple backslashes; regex?
On 3/15/2010 5:03 PM, Jim Lucas wrote:
Al wrote:
Anyone have a regex pattern for deleting multiple backslashes e.g., \\\
I pretty good with regex; but, be damned if I can delete them with
preg_replace()
I've tried "" as the manual says
preg_replace("//", '', $str);
preg_replace("/()+/", '', $str);
preg_replace("/\x5C/", '', $str);
preg_replace("/\\x5c/", '', $str);
And lots of others.
stripslashes() and stripcslashes() are limited.
Might I ask, how are the multiple slashes getting generated in the first place?
Where is the data coming from?
Next question would be: Do you want to completely remove all instances of
multiple backslashes? Or, do you want to replace all instances of multiple
backslashes with a single backslash?
I would try something like this:
done!
As I reported earlier, problem was my code was reloading a POST array following
the backlash removal. Dumb error on my part.
Re: "Might I ask, how are the multiple slashes getting generated in the first
place? Where is the data coming from?" It comes from a client-side editor where
users can enter them at will. It is my standard practice to do a good job of
protecting users from themselves. I originally just had the usual stripslashes()
but found it didn't take care of users adding several.
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Re: [PHP] Deleting multiple backslashes; regex?
Al wrote:
> Anyone have a regex pattern for deleting multiple backslashes e.g., \\\
>
> I pretty good with regex; but, be damned if I can delete them with
> preg_replace()
>
> I've tried "" as the manual says
>
> preg_replace("//", '', $str);
>
> preg_replace("/()+/", '', $str);
>
> preg_replace("/\x5C/", '', $str);
>
> preg_replace("/\\x5c/", '', $str);
>
> And lots of others.
>
> stripslashes() and stripcslashes() are limited.
>
>
>
Might I ask, how are the multiple slashes getting generated in the first place?
Where is the data coming from?
Next question would be: Do you want to completely remove all instances of
multiple backslashes? Or, do you want to replace all instances of multiple
backslashes with a single backslash?
I would try something like this:
done!
--
Jim Lucas
NOC Manager
541-323-9113
BendTel, Inc.
http://www.bendtel.com
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Re: [PHP] Deleting multiple backslashes; regex?
On 3/15/2010 3:30 PM, Ashley Sheridan wrote:
On Mon, 2010-03-15 at 15:35 -0400, Al Rider wrote:
On 3/15/2010 3:11 PM, Ashley Sheridan wrote:
On Mon, 2010-03-15 at 15:03 -0400, Al wrote:
Anyone have a regex pattern for deleting multiple backslashes e.g., \\\
I pretty good with regex; but, be damned if I can delete them with
preg_replace()
I've tried "" as the manual says
preg_replace("//", '', $str);
preg_replace("/()+/", '', $str);
preg_replace("/\x5C/", '', $str);
preg_replace("/\\x5c/", '', $str);
And lots of others.
stripslashes() and stripcslashes() are limited.
What about this:
$str = 'text\\dfnfg\\dhdsg';
echo preg_replace('/\\\{2,}/', '', $str);
I think what was catching you out was that you were escaping the \
once for the regex, but then it needed it again because it was in a
single quoted string, meaning 3 slashes in total. Took me a little
while to figure that out as well!
The {2,} part just tells it to only remove the slashes where they
occur in runs of two or more.
I agree, it should work; but, it doesn't.
Most everything that looks reasonable works in The Regex Coach,
including you suggestion.
I'm starting to think there is a bug in the regex engine; haven't
looked yet. It's doubtful though because the bug would screw existing
code.
Thanks,
Ash
http://www.ashleysheridan.co.uk
I tried the code I just gave you and it's working, so I'm not sure now
what issue you're having with it?
Thanks,
Ash
http://www.ashleysheridan.co.uk
Thanks ever so much guys. Sometimes it's helpful when someone else confirms
something must work.
Problem was that I had a series of cleanup and security checks on a POST array
and inadvertently used the original POST array in one of the steps following the
backslash remove step, so obviously it didn't work.
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Re: [PHP] Deleting multiple backslashes; regex?
Double check your code I came up with the same solution as Ash did and it
worked fine in Wamp.
On Mon, Mar 15, 2010 at 3:30 PM, Ashley Sheridan
wrote:
> On Mon, 2010-03-15 at 15:35 -0400, Al Rider wrote:
>
> >
> >
> > On 3/15/2010 3:11 PM, Ashley Sheridan wrote:
> >
> > > On Mon, 2010-03-15 at 15:03 -0400, Al wrote:
> > >
> > > > Anyone have a regex pattern for deleting multiple backslashes e.g.,
> \\\
> > > >
> > > > I pretty good with regex; but, be damned if I can delete them with
> preg_replace()
> > > >
> > > > I've tried "" as the manual says
> > > >
> > > > preg_replace("//", '', $str);
> > > >
> > > > preg_replace("/()+/", '', $str);
> > > >
> > > > preg_replace("/\x5C/", '', $str);
> > > >
> > > > preg_replace("/\\x5c/", '', $str);
> > > >
> > > > And lots of others.
> > > >
> > > > stripslashes() and stripcslashes() are limited.
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > > What about this:
> > >
> > > $str = 'text\\dfnfg\\dhdsg';
> > > echo preg_replace('/\\\{2,}/', '', $str);
> > >
> > > I think what was catching you out was that you were escaping the \
> > > once for the regex, but then it needed it again because it was in a
> > > single quoted string, meaning 3 slashes in total. Took me a little
> > > while to figure that out as well!
> > >
> > > The {2,} part just tells it to only remove the slashes where they
> > > occur in runs of two or more.
> > >
> >
> >
> > I agree, it should work; but, it doesn't.
> >
> > Most everything that looks reasonable works in The Regex Coach,
> > including you suggestion.
> >
> > I'm starting to think there is a bug in the regex engine; haven't
> > looked yet. It's doubtful though because the bug would screw existing
> > code.
> >
> > > Thanks,
> > > Ash
> > > http://www.ashleysheridan.co.uk
> > >
> > >
> > >
>
>
> I tried the code I just gave you and it's working, so I'm not sure now
> what issue you're having with it?
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>
Re: [PHP] Deleting multiple backslashes; regex?
On Mon, 2010-03-15 at 15:35 -0400, Al Rider wrote:
>
>
> On 3/15/2010 3:11 PM, Ashley Sheridan wrote:
>
> > On Mon, 2010-03-15 at 15:03 -0400, Al wrote:
> >
> > > Anyone have a regex pattern for deleting multiple backslashes e.g.,
> > > \\\
> > >
> > > I pretty good with regex; but, be damned if I can delete them with
> > > preg_replace()
> > >
> > > I've tried "" as the manual says
> > >
> > > preg_replace("//", '', $str);
> > >
> > > preg_replace("/()+/", '', $str);
> > >
> > > preg_replace("/\x5C/", '', $str);
> > >
> > > preg_replace("/\\x5c/", '', $str);
> > >
> > > And lots of others.
> > >
> > > stripslashes() and stripcslashes() are limited.
> > >
> > >
> > >
> > >
> >
> >
> > What about this:
> >
> > $str = 'text\\dfnfg\\dhdsg';
> > echo preg_replace('/\\\{2,}/', '', $str);
> >
> > I think what was catching you out was that you were escaping the \
> > once for the regex, but then it needed it again because it was in a
> > single quoted string, meaning 3 slashes in total. Took me a little
> > while to figure that out as well!
> >
> > The {2,} part just tells it to only remove the slashes where they
> > occur in runs of two or more.
> >
>
>
> I agree, it should work; but, it doesn't.
>
> Most everything that looks reasonable works in The Regex Coach,
> including you suggestion.
>
> I'm starting to think there is a bug in the regex engine; haven't
> looked yet. It's doubtful though because the bug would screw existing
> code.
>
> > Thanks,
> > Ash
> > http://www.ashleysheridan.co.uk
> >
> >
> >
I tried the code I just gave you and it's working, so I'm not sure now
what issue you're having with it?
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] Deleting multiple backslashes; regex?
On Mon, 2010-03-15 at 15:03 -0400, Al wrote:
> Anyone have a regex pattern for deleting multiple backslashes e.g., \\\
>
> I pretty good with regex; but, be damned if I can delete them with
> preg_replace()
>
> I've tried "" as the manual says
>
> preg_replace("//", '', $str);
>
> preg_replace("/()+/", '', $str);
>
> preg_replace("/\x5C/", '', $str);
>
> preg_replace("/\\x5c/", '', $str);
>
> And lots of others.
>
> stripslashes() and stripcslashes() are limited.
>
>
>
What about this:
$str = 'text\\dfnfg\\dhdsg';
echo preg_replace('/\\\{2,}/', '', $str);
I think what was catching you out was that you were escaping the \ once
for the regex, but then it needed it again because it was in a single
quoted string, meaning 3 slashes in total. Took me a little while to
figure that out as well!
The {2,} part just tells it to only remove the slashes where they occur
in runs of two or more.
Thanks,
Ash
http://www.ashleysheridan.co.uk
[PHP] Deleting multiple backslashes; regex?
Anyone have a regex pattern for deleting multiple backslashes e.g., \\\
I pretty good with regex; but, be damned if I can delete them with
preg_replace()
I've tried "" as the manual says
preg_replace("//", '', $str);
preg_replace("/()+/", '', $str);
preg_replace("/\x5C/", '', $str);
preg_replace("/\\x5c/", '', $str);
And lots of others.
stripslashes() and stripcslashes() are limited.
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