Regular Expressions 101

Pro

^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 : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:[^@\n]+@)?

?repeats the group contents below at most once:

Negated Character Class[^@\n]+

+matches at least one character outside the set below:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\na line-feed (newline) character (ASCII 10)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

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

?repeats the group contents below at most once:

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 1([^:\n?=ֿ#]+?)

Negated Character Class[^:\n?=ֿ#]+?

+?matches at least one character outside the set below:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\na line-feed (newline) character (ASCII 10)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

ֿthe literal ֿ (1471₁₀ / 2677₈ / 5BF₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

Positive Lookahead(?=\?|$)

1st Alternative\?

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

2nd Alternative$

$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

^(?:https?:\/\/)?(?:[^@\n]+@)?(?:www\.)?([^:\n?=ֿ#]+?)\/?(?=\?|$)

New

domain.com/home/
domain.com/home/abc/
domain.com/home?param=value

domain.com/home/
domain.com/home/abc/
domain.com/home?param=value