Regular Expressions 101

Pro

Group 1(https{0,1}:\/\/)

httpthe literal text http (case sensitive)

s{0,1}optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

(https{0,1}:\/\/)

New

https://regex101.com
https://stackoverflow.com/questions/57601242/why-is-this-regex-expression-not-matching-the-string-exactly
http://www.regular-expressions.info/optional.html
https://www.youtube.com/watch?v=iA9DlBSMQ4c

Extraction

https://regex101.com
https://stackoverflow.com/questions/57601242/why-is-this-regex-expression-not-matching-the-string-exactly
http://www.regular-expressions.info/optional.html
https://www.youtube.com/watch?v=iA9DlBSMQ4c