regex101: URL

Pro

Negative Lookbehind(?<!=\")

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

\ban ASCII word boundary

Group 1((?:http|https|ftp):\/\/)

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

1st Alternativehttp

httpthe literal text http (case sensitive)

2nd Alternativehttps

httpsthe literal text https (case sensitive)

3rd Alternativeftp

ftpthe literal text ftp (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2((?:(?:\w)+\.)+(?:\w)+)

Non-Capturing Group(?:(?:\w)+\.)+

+repeats the group contents below at least once:

Non-Capturing Group(?:\w)+

+repeats the group contents below at least once:

\wany word character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:\w)+

+repeats the group contents below at least once:

\wany word character

Group 3(:\d+)?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d+a digit, repeated at least once

Group 4((?:\/[\w]+)*[.\w]*\/?)

Non-Capturing Group(?:\/[\w]+)*

*repeats the group contents below any number of times:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[\w]+

+matches at least one character from the set below:

\wany word character

Character Class[.\w]*

*matches any number of characters from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\wany word character

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

Group 5((?:[\?\w\=\_\-%+!$^*\/\\@#;:]|(?:&(?!gt;)|(?:['"](?=[\w"'&#,]))))*)

Non-Capturing Group(?:[\?\w\=\_\-%+!$^*\/\\@#;:]|(?:&(?!gt;)|(?:['"](?=[\w"'&#,]))))*

*repeats the group contents below any number of times:

1st Alternative[\?\w\=\_\-%+!$^*\/\\@#;:]

Character Class[\?\w\=\_\-%+!$^*\/\\@#;:]

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

\wany word character

\=the literal = (61₁₀ / 75₈ / 3D₁₆)

\_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd Alternative(?:&(?!gt;)|(?:['"](?=[\w"'&#,])))

Non-Capturing Group(?:&(?!gt;)|(?:['"](?=[\w"'&#,])))

1st Alternative&(?!gt;)

&the literal & (38₁₀ / 46₈ / 26₁₆)

Negative Lookahead(?!gt;)

gt;the literal text gt; (case sensitive)

2nd Alternative(?:['"](?=[\w"'&#,]))

Non-Capturing Group(?:['"](?=[\w"'&#,]))

Character Class['"]

Positive Lookahead(?=[\w"'&#,])

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

25 tokens

Regular Expression

(?<!=\")\b((?:http|https|ftp):\/\/)((?:(?:\w)+\.)+(?:\w)+)(:\d+)?((?:\/[\w]+)*[.\w]*\/?)((?:[\?\w\=\_\-%+!$^*\/\\@#;:]|(?:&(?!gt;)|(?:['"](?=[\w"'&#,]))))*)

New

&lt;http://www.google.com.edu:8080/path/to/ting.this?this=that&that=this#21&gt; 
<http://www.google.com/path/to/thing/?this=that&that=this#21>
http://google.com
https://www.yy.sdf.yahoo.com.sdf.s.dsf.cat/
"ftp://msn.com/path.thing"
'http://askdeeves.com/sdf?asdf="sdf"&cat=blue'
<http://ask.com#21> 
href="http://askdeeves.com/sdf?asdf="sdf"&cat=blue"

Extraction

&lt;http://www.google.com.edu:8080/path/to/ting.this?this=that&that=this#21&gt; 
<http://www.google.com/path/to/thing/?this=that&that=this#21>
http://google.com
https://www.yy.sdf.yahoo.com.sdf.s.dsf.cat/
"ftp://msn.com/path.thing"
'http://askdeeves.com/sdf?asdf="sdf"&cat=blue'
<http://ask.com#21> 
href="http://askdeeves.com/sdf?asdf="sdf"&cat=blue"