regex101: PCRE (Legacy) Match Workspace

Pro

Negative Lookbehind(?<![^\{]\{)

Negated Character Class[^\{]

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Non-Capturing Group(?:(?:(?:[A-Za-z_]\w*|(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)))?(?:\.[A-Za-z_]\w*|\[(?:(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)|[^\]\}}\{{]+)\])*)?

?repeats the group contents below at most once:

Non-Capturing Group(?:(?:[A-Za-z_]\w*|(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)))?

?repeats the group contents below at most once:

Non-Capturing Group(?:[A-Za-z_]\w*|(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+))

1st Alternative[A-Za-z_]\w*

Character Class[A-Za-z_]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

2nd Alternative(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)

Non-Capturing Group(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)

1st Alternative[1-9]\d*

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\d*a digit, repeated any number of times

2nd Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

3rd Alternative0[Oo]?[0-7]+

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[Oo]?

?matches at most one character from the set below:

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

Character Class[0-7]+

+matches at least one character from the set below:

0-7one character from 0 (48₁₀) to 7 (55₁₀)

4th Alternative0[Xx][0-7]+

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[Xx]

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Character Class[0-7]+

+matches at least one character from the set below:

0-7one character from 0 (48₁₀) to 7 (55₁₀)

5th Alternative0[Bb][01]+

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[Bb]

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Character Class[01]+

+matches at least one character from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Non-Capturing Group(?:\.[A-Za-z_]\w*|\[(?:(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)|[^\]\}}\{{]+)\])*

*repeats the group contents below any number of times:

1st Alternative\.[A-Za-z_]\w*

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[A-Za-z_]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

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

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

2nd Alternative\[(?:(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)|[^\]\}}\{{]+)\]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)|[^\]\}}\{{]+)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Non-Capturing Group(?:\![rsa])?

Non-Capturing Group(?:\:(?:(?:.?[<>=\^])?[\x20+-]?\#?0?(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)?,?(?:\.(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+))?[bcdEeFfGgnosXx%]?))?

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Negative Lookahead(?!\}[^\}])

Global pattern flags

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

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

25 tokens

Regular Expression

(?<![^\{]\{)\{(?:(?:(?:[A-Za-z_]\w*|(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)))?(?:\.[A-Za-z_]\w*|\[(?:(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)|[^\]\}}\{{]+)\])*)?(?:\![rsa])?(?:\:(?:(?:.?[<>=\^])?[\x20+-]?\#?0?(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+)?,?(?:\.(?:[1-9]\d*|0|0[Oo]?[0-7]+|0[Xx][0-7]+|0[Bb][01]+))?[bcdEeFfGgnosXx%]?))?\}(?!\}[^\}])

Unit Tests

There are no unit tests, click to add some.