regex101: PCRE (Legacy) Match Workspace

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

Positive Lookahead(?=[^$]{3,100}\$)

Negated Character Class[^$]{3,100}

{3,100}matches between 3 and 100 characters outside the set below:

$the literal $ (36₁₀ / 44₈ / 24₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

Group PH(?<PH>[A-Za-z0-9:_-]{1,20})

Character Class[A-Za-z0-9:_-]{1,20}

{1,20}matches between 1 and 20 characters from the set below:

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

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?: (?<C1>\/) (?<RX>(?:[^\\\/\r\n]|\\\/?)*) \/ (?: (?<R>(?:[^\\\/\r\n$]|\\[\/$]?)*) \/ | (?<G>\d*) ) | (?: (?<C2>$) (?<F>(?:[^\t\r\n\f()]|\\[()]?)*) $ )? )

1st Alternative (?<C1>\/) (?<RX>(?:[^\\\/\r\n]|\\\/?)*) \/ (?: (?<R>(?:[^\\\/\r\n$]|\\[\/$]?)*) \/ | (?<G>\d*) )

Group C1(?<C1>\/)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group RX(?<RX>(?:[^\\\/\r\n]|\\\/?)*)

Non-Capturing Group(?:[^\\\/\r\n]|\\\/?)*

*repeats the group contents below any number of times:

1st Alternative[^\\\/\r\n]

Negated Character Class[^\\\/\r\n]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

2nd Alternative\\\/?

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?: (?<R>(?:[^\\\/\r\n$]|\\[\/$]?)*) \/ | (?<G>\d*) )

1st Alternative (?<R>(?:[^\\\/\r\n$]|\\[\/$]?)*) \/

Group R(?<R>(?:[^\\\/\r\n$]|\\[\/$]?)*)

Non-Capturing Group(?:[^\\\/\r\n$]|\\[\/$]?)*

*repeats the group contents below any number of times:

1st Alternative[^\\\/\r\n$]

Negated Character Class[^\\\/\r\n$]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

2nd Alternative\\[\/$]?

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Character Class[\/$]?

?matches at most one character from the set below:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative (?<G>\d*)

Group G(?<G>\d*)

\d*a digit, repeated any number of times

2nd Alternative (?: (?<C2>$) (?<F>(?:[^\t\r\n\f()]|\\[()]?)*) $ )?

Non-Capturing Group(?: (?<C2>$) (?<F>(?:[^\t\r\n\f()]|\\[()]?)*) $ )?

?repeats the group contents below at most once:

Group C2(?<C2>\()

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group F(?<F>(?:[^\t\r\n\f()]|\\[()]?)*)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

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

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

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

Search reference

Regular Expression

\$
(?=[^$]{3,100}\$)
(?<PH>[A-Za-z0-9:_-]{1,20})
(?:
  (?<C1>\/)
  (?<RX>(?:[^\\\/\r\n]|\\\/?)*)
  \/
  (?:
    (?<R>(?:[^\\\/\r\n$]|\\[\/$]?)*)
    \/
    |
    (?<G>\d*)
  )
  |
  (?:
    (?<C2>\()
    (?<F>(?:[^\t\r\n\f()]|\\[()]?)*)
    \)
  )?
)
\$

Unit Tests

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