regex101: Long url extractor

Pro

(?i)applies the following effective flags to the remainder of the pattern: gmi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

\ba Unicode word boundary

Group 1((?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s($)<>]+|$([^\s()<>]+|(\([^\s( )<>]+$))*\))+(?:$([^\s()<>]+|(\([^\s($r)<>]+$))*\)|[^\s`!()\[\]{};:'\".,<>?«»“”‘’]))

Non-Capturing Group(?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)

1st Alternativehttps?://

httpthe literal text http (case insensitive)

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

://the literal text ://

2nd Alternativewww\d{0,3}[.]

wwwthe literal text www (case insensitive)

\d{0,3}a Unicode decimal digit, repeated between 0 and 3 times

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

3rd Alternative[a-z0-9.\-]+[.][a-z]{2,4}/

Character Class[a-z0-9.\-]+

+matches at least one character from the set below:

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

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

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[.]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[a-z]{2,4}

{2,4}matches between 2 and 4 characters from the set below:

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

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:[^\s($)<>]+|$([^\s()<>]+|(\([^\s( )<>]+$))*\))+

+repeats the group contents below at least once:

1st Alternative[^\s($)<>]+

Negated Character Class[^\s($)<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative$([^\s()<>]+|(\([^\s( )<>]+$))*\)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2([^\s()<>]+|($[^\s( )<>]+$))*

*repeats the group contents below any number of times:

1st Alternative[^\s()<>]+

Negated Character Class[^\s()<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative($[^\s( )<>]+$)

Group 3($[^\s( )<>]+$)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^\s( )<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Non-Capturing Group(?:$([^\s()<>]+|(\([^\s($r)<>]+$))*\)|[^\s`!()\[\]{};:'\".,<>?«»“”‘’])

1st Alternative$([^\s()<>]+|(\([^\s($r)<>]+$))*\)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 4([^\s()<>]+|($[^\s($r)<>]+$))*

*repeats the group contents below any number of times:

1st Alternative[^\s()<>]+

Negated Character Class[^\s()<>]+

+matches at least one character outside the set below:

\sa Unicode whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

2nd Alternative($[^\s($r)<>]+$)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative[^\s`!()\[\]{};:'\".,<>?«»“”‘’]

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

25 tokens

Regular Expression

(?i)\b((?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s($)<>]+|\(([^\s()<>]+|(\([^\s( )<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s($r)<>]+\)))*\)|[^\s`!()\[\]{};:'\".,<>?«»“”‘’]))

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