regex101: PCRE (Legacy) Match Workspace

Definition Group(?(DEFINE)(?'NAMESPACE'\w*::))

Group NAMESPACE(?'NAMESPACE'\w*::)

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

::the literal text ::

Comment: r

Definition Group(?(DEFINE)(?'CONSTANT'("(?:[^"\\]|\\.)*")|(\d+\.?\d*f?)))

Group CONSTANT(?'CONSTANT'("(?:[^"\\]|\\.)*")|(\d+\.?\d*f?))

1st Alternative("(?:[^"\\]|\\.)*")

Group 3("(?:[^"\\]|\\.)*")

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:[^"\\]|\\.)*

*repeats the group contents below any number of times:

1st Alternative[^"\\]

Negated Character Class[^"\\]

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

2nd Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative(\d+\.?\d*f?)

Group 4(\d+\.?\d*f?)

\d+a digit, repeated at least once

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

f?optionally matches the literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

Comment: r

Definition Group(?(DEFINE)(?'VARIABLE'(?P>NAMESPACE)*([A-Za-z_]\w*\.)*[A-Za-z_]\w*))

Group VARIABLE(?'VARIABLE'(?P>NAMESPACE)*([A-Za-z_]\w*\.)*[A-Za-z_]\w*)

(?P>NAMESPACE)*calls group NAMESPACE as a subroutine, repeated any number of times

Group 6([A-Za-z_]\w*\.)*

*repeats the group contents below any number of times:

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

\.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

Comment: r

Definition Group(?(DEFINE)(?'OPERAND'(\+|-)*((?P>VARIABLE)|(?P>CONSTANT))))

Group OPERAND(?'OPERAND'(\+|-)*((?P>VARIABLE)|(?P>CONSTANT)))

Group 8(\+|-)*

*repeats the group contents below any number of times:

1st Alternative\+

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 9((?P>VARIABLE)|(?P>CONSTANT))

1st Alternative(?P>VARIABLE)

(?P>VARIABLE)calls group VARIABLE as a subroutine

2nd Alternative(?P>CONSTANT)

(?P>CONSTANT)calls group CONSTANT as a subroutine

Comment: r

Definition Group(?(DEFINE)(?'EXPRESSION'\s*(?P>OPERAND)\s*(\s*[\*\+-\/]\s*(?P>OPERAND))*))

Comment: r

Definition Group(?(DEFINE)(?'ARGUMENTS'(?P>EXPRESSION)(,\s*(?P>EXPRESSION))*))

Comment: r

Definition Group(?(DEFINE)(?'FUNCTION_CALL'(?P>VARIABLE)\(\s*(?P>ARGUMENTS)?\s*\)))

Comment: r

(?P>FUNCTION_CALL)calls group FUNCTION_CALL as a subroutine

Global pattern flags

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

Search reference

Regular Expression

(?(DEFINE)(?'NAMESPACE'\w*::))(?#r)(?(DEFINE)(?'CONSTANT'("(?:[^"\\]|\\.)*")|(\d+\.?\d*f?)))(?#r)(?(DEFINE)(?'VARIABLE'(?P>NAMESPACE)*([A-Za-z_]\w*\.)*[A-Za-z_]\w*))(?#r)(?(DEFINE)(?'OPERAND'(\+|-)*((?P>VARIABLE)|(?P>CONSTANT))))(?#r)(?(DEFINE)(?'EXPRESSION'\s*(?P>OPERAND)\s*(\s*[\*\+-\/]\s*(?P>OPERAND))*))(?#r)(?(DEFINE)(?'ARGUMENTS'(?P>EXPRESSION)(,\s*(?P>EXPRESSION))*))(?#r)(?(DEFINE)(?'FUNCTION_CALL'(?P>VARIABLE)\(\s*(?P>ARGUMENTS)?\s*\)))(?#r)(?P>FUNCTION_CALL)

Unit Tests

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