Regular Expressions 101

Pro

Negative Lookbehind(?<!\\)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\{2})*

*repeats the group contents below any number of times:

\\{2}the literal \ (92₁₀ / 134₈ / 5C₁₆) , repeated exactly 2 times

Group 1((['"`])|([\[]))

1st Alternative(['"`])

Group 2(['"`])

Character Class['"`]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

`the literal ` (96₁₀ / 140₈ / 60₁₆)

2nd Alternative([\[])

Group 3([\[])

Character Class[\[]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:\\.|(?!\g{4}).)*+

*+repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

2nd Alternative(?!\g{4}).

Negative Lookahead(?!\g{4})

\g{4}the text saved by group 4

.any character (except for line terminators)

Group 4((\g{2})|([\]]))

1st Alternative(\g{2})

Group 5(\g{2})

\g{2}the text saved by group 2

2nd Alternative([\]])

Group 6([\]])

Character Class[\]]

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?<!\\)(?:\\{2})*((['"`])|([\[]))(?:\\.|(?!\g{4}).)*+((\g{2})|([\]]))

New

\` \' \" can escape delimiters outside
'can \'escape\' active delimiters inside'
'can use' "different delimiters"
`can '"'"'"'""' ignore non-active delimiters`
[ delimiting \] ]

Substitution

${1}SUCCESS${4}

\` \' \" can escape delimiters outside
'can \'escape\' active delimiters inside'
'can use' "different delimiters"
`can '"'"'"'""' ignore non-active delimiters`
[ delimiting \] ]