Regular Expressions 101

Pro

BLAthe literal text BLA (case sensitive)

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

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

Negative Lookahead(?!BLA)

BLAthe literal text BLA (case sensitive)

.any character (except for line terminators)

my textthe literal text my text (case sensitive)

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

LOOKthe literal text LOOK (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.

25 tokens

Regular Expression

BLA(?:(?!BLA).)*?my text.*?LOOK

New

BLA text text text  text text text BLA text text text text LOOK BLA text my text text LOOK text text text LOOK BLA text text LOOK BLA text my textLOOK  text LOOK

Substitution

BLA text text text  text text text BLA text text text text LOOK BLA text my text text LOOK text text text LOOK BLA text text LOOK BLA text my textLOOK  text LOOK