Regular Expressions 101

Pro

\ban ASCII word boundary

Group 1(((https?|ftp|dict):\/\/|www\.)[^'">\s]+\.[^'">\s]+)

Group 2((https?|ftp|dict):\/\/|www\.)

1st Alternative(https?|ftp|dict):\/\/

Group 3(https?|ftp|dict)

1st Alternativehttps?

httpthe literal text http (case insensitive)

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

2nd Alternativeftp

ftpthe literal text ftp (case insensitive)

3rd Alternativedict

dictthe literal text dict (case insensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternativewww\.

wwwthe literal text www (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^'">\s]+

+matches at least one character outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\sany whitespace character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^'">\s]+

+matches at least one character outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\sany whitespace character

Positive Lookahead(?=\s|$)

1st Alternative\s

\sany whitespace character

2nd Alternative$

$end of string

Negative Lookahead(?!["<>])

Character Class["<>]

"the literal " (34₁₀ / 42₈ / 22₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

\b(((https?|ftp|dict):\/\/|www\.)[^'">\s]+\.[^'">\s]+)(?=\s|$)(?!["<>])

New

my foobar http://www.google.com sfgsdg

my <a href="http://www.google.com">bla</a>

Extraction

my foobar http://www.google.com sfgsdg

my <a href="http://www.google.com">bla</a>