Regular Expressions 101

^start of string

Group 1(\[S3\]\s)?

?repeats the group contents below at most once:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

S3the literal text S3 (case sensitive)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

\sany whitespace character

Group 2(\*\s[A-Z][a-z0-9].+?\.\s?){3}

{3}repeats the group contents below exactly 3 times:

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

\sany whitespace character

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[a-z0-9]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

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

.+?any character (except for line terminators), repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\s?optionally matches any whitespace character

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Ready to run

Search reference

Regular Expression

^(\[S3\]\s)?(\*\s[A-Z][a-z0-9].+?\.\s?){3}