RegExp to match pattern or BLANK?

[Eric]

Hi,

I want to write a regexp that matches either a blank value or a pattern. I'm
checking user data for a 'telephone' field which I want to allow to be blank
OR have at least 11 digits.

I've tried

if ($data =~ m/{0}|\d{11,}/) { etc etc

But it doesn't work

OK I know I can do it with some code, but my system reads regexps from a
config file and I'd like to keep my system versatile.

Cheers,

Eric

passme

 

[Michael Zawrotny]

I want to write a regexp that matches either a blank value or a pattern. I'm
checking user data for a 'telephone' field which I want to allow to be blank
OR have at least 11 digits.

I've tried

if ($data =~ m/{0}|\d{11,}/) { etc etc

Try

if($data =~ /^(\d{11,})?$/) { ...


Mike

 

[David Oswald]

I want to write a regexp that matches either a blank value or a pattern. I'm
checking user data for a 'telephone' field which I want to allow to be blank
OR have at least 11 digits.

I've tried

if ($data =~ m/{0}|\d{11,}/) { etc etc

But it doesn't work

OK I know I can do it with some code, but my system reads regexps from a
config file and I'd like to keep my system versatile.

m/^(?:\d{11,})?$/

That matches a string consisting optionally of eleven or more digits. It
will not match a string containing anything else, nor will it match a string
containing any number of digits less than eleven, except for zero digits.

If your phone number contains hyphens or paranthesis, you're going to have
to get more creative.

DaveO