Regular Expressions 101

Explanation

Pro

Group 1(this is.{0,2})?

?repeats the group contents below at most once:

this isthe literal text this is (case insensitive)

.{0,2}any character (except for line terminators), repeated between 0 and 2 times

Group 2(an.{0,2})?

?repeats the group contents below at most once:

anthe literal text an (case insensitive)

.{0,2}any character (except for line terminators), repeated between 0 and 2 times

Group 3(example sentence)

example sentencethe literal text example sentence (case insensitive)

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

26 tokens

(this is.{0,2})?(an.{0,2})?(example sentence)

blah blah. An example sentence
blah blah. This is an example sentence
Something something Example sentence

blah blah. An example sentence
blah blah. This is an example sentence
Something something Example sentence