Regular Expressions 101

Pro

\ba Unicode word boundary

Group 1(ab|cd)

1st Alternativeab

abthe literal text ab (case sensitive)

2nd Alternativecd

cdthe literal text cd (case sensitive)

\??optionally matches the literal ? (63₁₀ / 77₈ / 3F₁₆)

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

\b(ab|cd)\??

New

id
ab? op
ab? 1
cd
efab? cba
efab? 1
efab? 2
fab? 4
fab? po

id
ab? op
ab? 1
cd
efab? cba
efab? 1
efab? 2
fab? 4
fab? po