Regular Expressions 101

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Community Patterns

2

regex101: RFC1918 Private IPv4 Addresses, but limited to matching /24 subnet host IDs

PCRE2 (PHP >=7.3)
POSIX ERE compatible, suitable for usage in Bash [ testing Attributions Derived from [regex101: RFC1918 - Private IPv4 addresses by 0100101101001.
Submitted by anonymous - 2 years ago
2

Quiz_7_Validate_An_IP

PCRE2 (PHP >=7.3)
Validate an IPv4 address. The addresses are four numbered separated by three dots, and can only have a maximum value of 255 in either octet. Start by trying to validate 172.16.254.1.
Submitted by anonymous - 8 months ago
3

Match a valid IPv4 or IPv6 address

PCRE (PHP <7.3)
This regular expression will match an IPv4 address as well as both compressed or uncompressed IPv6 address.
Submitted by Tom Groeneveld, SevOne.com - 9 years ago
3

IPv4 validation

ECMAScript (JavaScript)
validate an IP v4
Submitted by harimambura - 9 years ago
4

IPV4 address validation using recursion

PCRE (PHP <7.3)
Validate IPv4 addresses using PCRE's recursion patterns. A shorter but less efficient alternative to https://regex101.com/r/wZ6oY5/1
Submitted by Captain Haddock - 10 years ago
9

IPv4 Validator

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 5 years ago (Last modified 2 years ago)
15

IPv4

PCRE (PHP <7.3)
no description available
Submitted by robwa - 10 years ago
35

IP Address validator

ECMAScript (JavaScript)
Validates IPv4 IP Address
Submitted by krzysp - 10 years ago
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