Regular Expressions 101

Group 1((\b\w+\b)\s*\2\s*)+

+repeats the group contents below at least once:

Group 2(\b\w+\b)

\ba Unicode word boundary

\w+a Unicode word character, repeated at least once

\ba Unicode word boundary

\s*a Unicode whitespace character, repeated any number of times

\2the text saved by group 2

\s*a Unicode whitespace character, repeated any number of times

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

((\b\w+\b)\s*\2\s*)+

New

this is is is is is is is is a string
and here is another another another another example

\2