Re: [FWP] IP address regex golf

[Steven Alexander <stevena@teleport.com>]

"David L. Nicol" <david@kasey.umkc.edu> wrote:
> > > > Anyone have an example of a working regex for perl
> > > > to test for a valid IP
> > > > address that they would be willing to share?  
> > > 
> 
> /^((\d|[01]?\d\d|2[0-4]\d|25[0-5])\.){3}(\d|[01]?\d\d|2[0-4]\d|25[0-5])$/
> 
> or
[non-regex omitted]

Based on David's regex:

/^(?!\.)(?=(.*\.){3})(\.?(\d|[01]?\d\d|2[0-4]\d|25[0-5])){4}$/

  Steven Alexander
  stevena@teleport.com

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