Regular Expressions 101

Group 1(^(?:https?://)?(?:[^/]*))

^start of line

Non-Capturing Group(?:https?://)?

?repeats the group contents below at most once:

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://the literal text ://

Non-Capturing Group(?:[^/]*)

Negated Character Class[^/]*

*matches any number of characters outside the set below:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(^(?:https?://)?(?:[^/]*))

New

www.domain.com/testing/something
https://www.site.com/testing
https://test.com/