regex101: PCRE (Legacy) Match Workspace

^start of line

Group Email(?<Email>.*@)?

?repeats the group contents below at most once:

.*any character (except for line terminators), repeated any number of times

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group Protocol(?<Protocol>\w+:\/\/)?

?repeats the group contents below at most once:

\w+any word character, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group SubDomain(?<SubDomain>(?:[\w-]{2,63}\.){0,127}?)?

?repeats the group contents below at most once:

Non-Capturing Group(?:[\w-]{2,63}\.){0,127}?

{0,127}?repeats the group contents below between 0 and 127 times:

Character Class[\w-]{2,63}

{2,63}matches between 2 and 63 characters from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group DomainWithTLD(?<DomainWithTLD>(?<Domain>[\w-]{2,63})\.(?<TopLevelDomain>[\w-]{2,63}?)(?:\.(?<CountryCode>[a-z]{2}))?)

Group Domain(?<Domain>[\w-]{2,63})

Character Class[\w-]{2,63}

{2,63}matches between 2 and 63 characters from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group TopLevelDomain(?<TopLevelDomain>[\w-]{2,63}?)

Character Class[\w-]{2,63}?

{2,63}?matches between 2 and 63 characters from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:\.(?<CountryCode>[a-z]{2}))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group CountryCode(?<CountryCode>[a-z]{2})

Character Class[a-z]{2}

{2}matches exactly 2 characters from the set below:

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

Non-Capturing Group(?:[:](?<Port>\d+))?

?repeats the group contents below at most once:

Character Class[:]

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group Port(?<Port>\d+)

\d+a digit, repeated at least once

Group Path(?<Path>(?:[\/]\w*)+)?

?repeats the group contents below at most once:

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

+repeats the group contents below at least once:

Character Class[\/]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\w*any word character, repeated any number of times

Group QString(?<QString>(?<QSParams>(?:[?&=][\w-]*)+)?(?:[#](?<Anchor>\w*))*)?

?repeats the group contents below at most once:

Group QSParams(?<QSParams>(?:[?&=][\w-]*)+)?

?repeats the group contents below at most once:

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

+repeats the group contents below at least once:

Character Class[?&=]

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Character Class[\w-]*

*matches any number of characters from the set below:

\wany word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:[#](?<Anchor>\w*))*

*repeats the group contents below any number of times:

Character Class[#]

Group Anchor(?<Anchor>\w*)

$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

25 tokens

Regular Expression

^(?<Email>.*@)?(?<Protocol>\w+:\/\/)?(?<SubDomain>(?:[\w-]{2,63}\.){0,127}?)?(?<DomainWithTLD>(?<Domain>[\w-]{2,63})\.(?<TopLevelDomain>[\w-]{2,63}?)(?:\.(?<CountryCode>[a-z]{2}))?)(?:[:](?<Port>\d+))?(?<Path>(?:[\/]\w*)+)?(?<QString>(?<QSParams>(?:[?&=][\w-]*)+)?(?:[#](?<Anchor>\w*))*)?$

New

https://www.stackoverflow.co.uk/path/2?q=mysearch&and=more#stuff
foo://5th.4th.3rd.example.com:8042/over/there
foo://subdomain.example.com:8042/over/there?q=mysearch&name=ferret#nose
xn--diseolatinoamericano-66b.com
jane.doe@my-bank.no
example.com
www.example.com
example.co.uk
trailing-slash.com/
trailing-pound.com#
trailing-question.com?
probably-not-valid.com.cn
probably-not-valid.com.cn?&#
probably-not-valid.com.cn/?&#
example.com/page
example.com?key=value

# Example of URLs that SHOULD NOT match:
test.example.com
sub.test.example.com

Extraction

https://www.stackoverflow.co.uk/path/2?q=mysearch&and=more#stuff
foo://5th.4th.3rd.example.com:8042/over/there
foo://subdomain.example.com:8042/over/there?q=mysearch&name=ferret#nose
xn--diseolatinoamericano-66b.com
jane.doe@my-bank.no
example.com
www.example.com
example.co.uk
trailing-slash.com/
trailing-pound.com#
trailing-question.com?
probably-not-valid.com.cn
probably-not-valid.com.cn?&#
probably-not-valid.com.cn/?&#
example.com/page
example.com?key=value

# Example of URLs that SHOULD NOT match:
test.example.com
sub.test.example.com