Regular Expressions 101

BBBthe literal text BBB (case sensitive)

Group 1((?:(?!BBB).)*?)

Non-Capturing Group(?:(?!BBB).)*?

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

Negative Lookahead(?!BBB)

BBBthe literal text BBB (case sensitive)

.any character (except for line terminators)

EEEthe literal text EEE (case sensitive)

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

BBB((?:(?!BBB).)*?)EEE

New

BBB foo BBB bar EEE

        BBB bar EEE baz EEE

BBB foo BBB bar EEE baz EEE

BBBB            EEEE
BBBBB           EEEE
BBBBBB          EEEE
BBBB           EEEEE
BBBBB          EEEEE
BBBBBB         EEEEE
BBBB          EEEEEE
BBBBB         EEEEEE
BBBBBB        EEEEEE