Regular Expressions 101

^start of line

httpthe literal text http (case sensitive)

Non-Capturing Group(?:s?)

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

regex101the literal text regex101 (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 1([a-zA-Z0-9]{1,6})?

?repeats the group contents below at most once:

Character Class[a-zA-Z0-9]{1,6}

{1,6}matches between 1 and 6 characters from the set below:

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

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

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

$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.

Search reference

Regular Expression

^http(?:s?):\/\/regex101\.com\/r\/([a-zA-Z0-9]{1,6})?$

New

http://regex101.com/r/mH1fN5
http://regex101.com/r/fW0vZ2