Regular Expressions 101

Explanation

Pro

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 1((?:[^()]+|(?R))*+)

Non-Capturing Group(?:[^()]+|(?R))*+

*+repeats the group contents below any number of times:

1st Alternative[^()]+

Negated Character Class[^()]+

+matches at least one character outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative(?R)

(?R)recurses into the entire pattern

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

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.

25 tokens

\(((?:[^()]+|(?R))*+)\)

(Hello OR there) AND (big AND wide AND world)
(Hello OR there AND messing(it)up) AND (big AND wide AND world)