regex101: PCRE (Legacy) Match Workspace

Explanation

Pro

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Image: the literal text Image: (case insensitive)

Group 1([^|]*\.(?:jpe?g|svg))

Negated Character Class[^|]*

*matches any number of characters outside the set below:

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:jpe?g|svg)

1st Alternativejpe?g

jpthe literal text jp (case insensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (case insensitive)

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case insensitive)

2nd Alternativesvg

svgthe literal text svg (case insensitive)

Character Class[|]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

Group 2([^|]*)

Negated Character Class[^|]*

*matches any number of characters outside the set below:

|the literal | (124₁₀ / 174₈ / 7C₁₆)

Character Class[|]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

Group 3((?:[[]{2}[^\]]*\]\]|[^|[])*)

Non-Capturing Group(?:[[]{2}[^\]]*\]\]|[^|[])*

*repeats the group contents below any number of times:

1st Alternative[[]{2}[^\]]*\]\]

Character Class[[]{2}

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

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^\]]*

*matches any number of characters outside the set below:

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative[^|[]

Negated Character Class[^|[]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[|]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

Non-Capturing Group(?:((?:[[]{2}[^\]]*\]\]|[^|[])*)[|])?

?repeats the group contents below at most once:

Group 4((?:[[]{2}[^\]]*\]\]|[^|[])*)

Non-Capturing Group(?:[[]{2}[^\]]*\]\]|[^|[])*

*repeats the group contents below any number of times:

1st Alternative[[]{2}[^\]]*\]\]

Character Class[[]{2}

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

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^\]]*

*matches any number of characters outside the set below:

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative[^|[]

Negated Character Class[^|[]

|the literal | (124₁₀ / 174₈ / 7C₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[|]

Group 5((?:[[]{2}[^\]]*\]\]|(?:(?!\]|\|).))*)

Non-Capturing Group(?:[|]|\]\])

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Quick Reference

25 tokens

Regular Expression

\[\[Image:
([^|]*\.(?:jpe?g|svg))[|]
([^|]*)[|]
   ((?:[[]{2}[^\]]*\]\]|[^|[])*)[|]
(?:((?:[[]{2}[^\]]*\]\]|[^|[])*)[|])?
   ((?:[[]{2}[^\]]*\]\]|(?:(?!\]|\|).))*)(?:[|]|\]\])

New

<mediawiki xmlns="http://www.mediawiki.org/xml/export-0.3/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mediawiki.org/xml/export-0.3/ http://www.mediawiki.org/xml/export-0.3.xsd" version="0.3" xml:lang="en">
  <siteinfo>
    <sitename>Wikipedia</sitename>
    <base>http://en.wikipedia.org/wiki/Main_Page</base>
    <generator>MediaWiki 1.6alpha</generator>
    <case>first-letter</case>
      <namespaces>
      <namespace key="-2">Media</namespace>
      <namespace key="-1">Special</namespace>
      <namespace key="0" />
      <namespace key="1">Talk</namespace>
      <namespace key="2">User</namespace>
      <namespace key="3">User talk</namespace>
      <namespace key="4">Wikipedia</namespace>
      <namespace key="5">Wikipedia talk</namespace>
      <namespace key="6">Image</namespace>
      <namespace key="7">Image talk</namespace>
      <namespace key="8">MediaWiki</namespace>
      <namespace key="9">MediaWiki talk</namespace>
      <namespa