Regular Expressions 101

Pro

^start of line

Positive Lookahead(?=\d)

\da digit

Non-Capturing Group(?:\d+w\h*)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

wthe literal w (119₁₀ / 167₈ / 77₁₆) (case sensitive)

\h*any horizontal whitespace character, repeated any number of times

Non-Capturing Group(?:\b\d+d\h*)?

?repeats the group contents below at most once:

\ban ASCII word boundary

\d+a digit, repeated at least once

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

\h*any horizontal whitespace character, repeated any number of times

Non-Capturing Group(?:\b\d+h\h*)?

?repeats the group contents below at most once:

\ban ASCII word boundary

\d+a digit, repeated at least once

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

\h*any horizontal whitespace character, repeated any number of times

Non-Capturing Group(?:\b\d+m)?

?repeats the group contents below at most once:

\ban ASCII word boundary

\d+a digit, repeated at least once

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

$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

^(?=\d)(?:\d+w\h*)?(?:\b\d+d\h*)?(?:\b\d+h\h*)?(?:\b\d+m)?$

1w 3d 5h 3m
32d 5h 3m
3pp 2h 35m
2d 5qq 3m
2d 35m
3h 1w
1w3d5h3m
1w 3d  5h   3m