Regular Expressions 101

httpthe literal text http (case sensitive)

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

://the literal text ://

\S*?any character that is not Unicode whitespace, repeated any number of times

Positive Lookahead(?=(?<!=)https?://|$)

1st Alternative(?<!=)https?://

Negative Lookbehind(?<!=)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

httpthe literal text http (case sensitive)

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

://the literal text ://

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.

Search reference

Regular Expression

https?://\S*?(?=(?<!=)https?://|$)

http://foo.barhttps://foo.bazhttp://foo.bar?url=http://foo.baz
http://foo.bar?url=http://foo.baz?foo=bar&baz=quxhttp://