Regular Expressions 101

Group 1(^|[^\d:])

1st Alternative^

^start of line

2nd Alternative[^\d:]

Negated Character Class[^\d:]

\da Unicode decimal digit

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 2([0-5]?[0-9]:[0-5][0-9])

Character Class[0-5]?

?matches at most one character from the set below:

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Character Class[0-9]

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Character Class[0-9]

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

Group 3([^\d:]|$)

1st Alternative[^\d:]

Negated Character Class[^\d:]

\da Unicode decimal digit

:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd Alternative$

$end of line

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

(^|[^\d:])([0-5]?[0-9]:[0-5][0-9])([^\d:]|$)

New

23:45 Description blah 00:45 hey there 34:23 and then 1:00:45 0:00
and ignore 434:40:52
79:32
54:99
4:56