Regular Expressions 101

Explanation

Pro

^start of line

Non-Capturing Group(?:.*\.)?

?repeats the group contents below at most once:

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:microsoft|bing)

1st Alternativemicrosoft

microsoftthe literal text microsoft (case sensitive)

2nd Alternativebing

bingthe literal text bing (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:de|com)

1st Alternativede

dethe literal text de (case sensitive)

2nd Alternativecom

comthe literal text com (case sensitive)

$end of line

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

^(?:.*\.)?(?:microsoft|bing)\.(?:de|com)$

New

something.microsoft.com
something.bing.de
somethingmicrosoft.com
something-bing.com
microsoft.com
bing.de