Regular Expressions 101

Non-Capturing Group(?:(?:(?:0*(\d+)d\s)?0*(\d+)h\s)?0*(\d+)m\s)?

?repeats the group contents below at most once:

Non-Capturing Group(?:(?:0*(\d+)d\s)?0*(\d+)h\s)?

?repeats the group contents below at most once:

Non-Capturing Group(?:0*(\d+)d\s)?

?repeats the group contents below at most once:

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

Group 1(\d+)

\d+a digit, repeated at least once

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

\sany whitespace character

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

Group 2(\d+)

\d+a digit, repeated at least once

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

\sany whitespace character

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

Group 3(\d+)

\d+a digit, repeated at least once

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

\sany whitespace character

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

Group 4(\d+)

\d+a digit, repeated at least once

sthe literal s (115₁₀ / 163₈ / 73₁₆) (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

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Search reference

Regular Expression

(?:(?:(?:0*(\d+)d\s)?0*(\d+)h\s)?0*(\d+)m\s)?0*(\d+)s

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