preg problem

[TekWiz]

I'm using regex to validate data, but preg_match gives the Warning
"Unknown modifier '\' " when I have '\\' in the regular expression.

Is this a problem with preg_match() or do I have to do something
different with regex?

Note: I ran my expression through "The Regex Coach" by Dr. Weitz and it
worked properly.

--TekWiz

[Markku Uttula]

TekWiz wrote:

I'm using regex to validate data, but preg_match gives the Warning
"Unknown modifier '\' " when I have '\\' in the regular expression.

Is this a problem with preg_match() or do I have to do something
different with regex?

I might be totally off here, but I believe that in PHP you need to
escape the backslash once for PHP and a second time for Regular
Expression.

--
Markku Uttula

[Colin McKinnon]

TekWiz wrote:

I'm using regex to validate data, but preg_match gives the Warning
"Unknown modifier '\' " when I have '\\' in the regular expression.

Sure your code doesn't contain "\\" ? If so then the string will be
un-escaped before the function call.

HTH

C.

[TekWiz]

Here's the actual regex string that's giving me problems (it's for
validating addresses:

'/[a-zA-Z0-9\,\.\;\:\-\&\\\/\#\s\']+/'

[TekWiz]

Markku Uttula wrote:

I might be totally off here, but I believe that in PHP you need to
escape the backslash once for PHP and a second time for Regular
Expression.

Thanks, you are correct. I've got to use '\\\\' to match the '\'
character.

Many heads are better than one.

--TekWiz