Regular Expressions 101

Pro

Non-Capturing Group(?:^|[^"'])

1st Alternative^

^start of line

2nd Alternative[^"']

Negated Character Class[^"']

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Group 1((?:ftp|https?|file):\/\/\S+)

Non-Capturing Group(?:ftp|https?|file)

1st Alternativeftp

ftpthe literal text ftp (case sensitive)

2nd Alternativehttps?

httpthe literal text http (case sensitive)

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

3rd Alternativefile

filethe literal text file (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\S+any non-whitespace character, repeated at least once

Non-Capturing Group(?:\b|$)

1st Alternative\b

\ban ASCII word boundary

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

(?:^|[^"'])((?:ftp|https?|file):\/\/\S+)(?:\b|$)

New

 #1: https://some.link