Regular Expressions 101

httpthe literal text http (case sensitive)

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[a-zA-Z0-9\.-]+

+matches at least one character 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)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 1(\/[\w\/\.\?=&%]+)?

?repeats the group contents below at most once:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[\w\/\.\?=&%]+

+matches at least one character from the set below:

\wany word character

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

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

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Search reference

Regular Expression

https?:\/\/[a-zA-Z0-9\.-]+(\/[\w\/\.\?=&%]+)?

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