Regular Expressions 101

Non-Capturing Group(?:[0-9a-fA-F]{1,4}:){7}

{7}repeats the group contents below exactly 7 times:

Character Class[0-9a-fA-F]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-9a-fA-F]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}

New

IP=FE80:0000:0000:0000:0202:B3FF:FE1E:8329 message='Hey&son' user=mother
IP=192.23.33.40 message='Hi&mom!' user=child0
IP=192.23.30.40 message='Hi&from&me&too' user=child1
IP=192.23.30.42 message='spam' user=destroyer
IP=192.23.30.42 message='spam' user=destroyer
IP=192.23.50.40 message='' user=yetAnotherUsername
IP=192.23.50.40 message='comment' user=yetAnotherUsername
IP=192.23.155.40 message='Hello.' user=unknown
end