Regular Expressions 101

Explanation

Pro

^start of line

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

Group 1(\d+([,\.]\d+)?Y)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Group 2([,\.]\d+)?

?repeats the group contents below at most once:

Character Class[,\.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Ythe literal Y (89₁₀ / 131₈ / 59₁₆) (case sensitive)

Group 3(\d+([,\.]\d+)?M)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Group 4([,\.]\d+)?

?repeats the group contents below at most once:

Character Class[,\.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

Group 5(\d+([,\.]\d+)?D)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Group 6([,\.]\d+)?

?repeats the group contents below at most once:

Character Class[,\.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Dthe literal D (68₁₀ / 104₈ / 44₁₆) (case sensitive)

Group 7(T(\d+([,\.]\d+)?H)?(\d+([,\.]\d+)?M)?(\d+([,\.]\d+)?S)?)?

?repeats the group contents below at most once:

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

Group 8(\d+([,\.]\d+)?H)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Group 9([,\.]\d+)?

?repeats the group contents below at most once:

Character Class[,\.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Hthe literal H (72₁₀ / 110₈ / 48₁₆) (case sensitive)

Group 10(\d+([,\.]\d+)?M)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Group 11([,\.]\d+)?

?repeats the group contents below at most once:

Character Class[,\.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

Group 12(\d+([,\.]\d+)?S)?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

Group 13([,\.]\d+)?

?repeats the group contents below at most once:

Character Class[,\.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (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

Unit Test Summary

Ready to run

Quick Reference

26 tokens

Regular Expression

^P(\d+([,\.]\d+)?Y)?(\d+([,\.]\d+)?M)?(\d+([,\.]\d+)?D)?(T(\d+([,\.]\d+)?H)?(\d+([,\.]\d+)?M)?(\d+([,\.]\d+)?S)?)?$

Regular Expression

Unit Tests