Regular Expressions 101

Pro

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

?repeats the group contents below at most once:

1st Alternativehttp://

http://the literal text http:// (case sensitive)

2nd Alternativehttps://

https://the literal text https:// (case sensitive)

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

?repeats the group contents below at most once:

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

cfxthe literal text cfx (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

re/join/the literal text re/join/ (case sensitive)

Character Class[a-z0-9:]{6}

{6}matches exactly 6 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

$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

(?:http://|https://)?(?:www\.)?cfx\.re/join/[a-z0-9:]{6}$

New

cfx.re/join/98e8ob
http://cfx.re/join/ydpmy9
https://cfx.re/join/bkomed
cfx.re/join/98e8oB
cfx.re/join/98e8obb
cfx.re/join/98e8o

cfx.re/join/98e8ob
http://cfx.re/join/ydpmy9
https://cfx.re/join/bkomed
cfx.re/join/98e8oB
cfx.re/join/98e8obb
cfx.re/join/98e8o