lt
/ gist:4162568
Created
November 28, 2012 17:07
— forked from nikic/gist:4162505
Regex to validate (IPv4) CIDR notation (with capture)
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| Repeating patterns, matches 0-255 in each octet, followed by /0-32 | |
| \b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/(3[0-2]|[1-2]?[0-9])\b | |
| Using subpatterns to achieve the same thing. | |
| \b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(?1)\.(?1)\.(?1)/(3[0-2]|[1-2]?[0-9])\b |