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.