Regular Expressions 101

.*?any character (except for line terminators), repeated any number of times

Group 1(\d{1,2}:\d{1,2}(?:\:\d{1,2}(?:\.\d{1,9})?)?)

\d{1,2}a digit, repeated between 1 and 2 times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

Non-Capturing Group(?:\:\d{1,2}(?:\.\d{1,9})?)?

?repeats the group contents below at most once:

\:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

Non-Capturing Group(?:\.\d{1,9})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,9}a digit, repeated between 1 and 9 times

.*any character (except for line terminators), repeated any number of times

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

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Search reference

Regular Expression

.*?(\d{1,2}:\d{1,2}(?:\:\d{1,2}(?:\.\d{1,9})?)?).*

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