Regular Expressions 101

\d{1,9}a digit, repeated between 1 and 9 times

Group 1(\.\d{1,9}(\.\d{1,9}(\.(\w|_|-)+)?)?)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,9}a digit, repeated between 1 and 9 times

Group 2(\.\d{1,9}(\.(\w|_|-)+)?)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,9}a digit, repeated between 1 and 9 times

Group 3(\.(\w|_|-)+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 4(\w|_|-)+

+repeats the group contents below at least once:

1st Alternative\w

\wany word character

2nd Alternative_

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

3rd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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{1,9}(\.\d{1,9}(\.\d{1,9}(\.(\w|_|-)+)?)?)?

3.0.2.alpha2