Regular Expressions 101

Group 1(\s+)?

?repeats the group contents below at most once:

\s+any whitespace character, repeated at least once

Group 2(.+?)

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

Group 3(\s+)?

?repeats the group contents below at most once:

\s+any whitespace character, repeated at least once

Group 4(years?|months?)

1st Alternativeyears?

yearthe literal text year (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

2nd Alternativemonths?

monththe literal text month (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

.*any character (except for line terminators), repeated any number of times

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

(\s+)?(.+?)(\s+)?(years?|months?).*

New

 Eight years blah blah 50 blah blah, two years blah blah blah.
Eight years blah blah 50 blah blah, two years blah blah blah.
Eight    months  blah blah 50 blah blah, two  years blah blah blah.
One  month  blah blah 50 blah blah, two  years blah blah blah.

Regular Expression

Extraction