Regular Expressions 101

Explanation

Pro

^start of string

Positive Lookahead(?=.*(There\b|\This\b|Dog))

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

Group 1(There\b|\This\b|Dog)

1st AlternativeThere\b

Therethe literal text There (case insensitive)

\ban ASCII word boundary

2nd Alternative\This\b

\Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case insensitive)

histhe literal text his (case insensitive)

\ban ASCII word boundary

3rd AlternativeDog

Dogthe literal text Dog (case insensitive)

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

$end of string

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

^(?=.*(There\b|\This\b|Dog)).*$

New

Lorem ipsum There dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor

Lorem ipsum There dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor