Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:[<>][1-9][0-9]?[hms]:[1-9][0-9]?[hms](?:;(?!$)|$))+

+repeats the group contents below at least once:

Character Class[<>]

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

Character Class[0-9]?

?matches at most one character from the set below:

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

Character Class[hms]

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

Character Class[0-9]?

?matches at most one character from the set below:

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

Character Class[hms]

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Non-Capturing Group(?:;(?!$)|$)

1st Alternative;(?!$)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Negative Lookahead(?!$)

$end of line

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.

25 tokens

^(?:[<>][1-9][0-9]?[hms]:[1-9][0-9]?[hms](?:;(?!$)|$))+$

<40m:22s
<40h:22s;<40m:22m

<40m:22m;
<40m:22m;<40m:22m;

<40m:22s
<40h:22s;<40m:22m

<40m:22m;
<40m:22m;<40m:22m;