regex101: PCRE2 (PHP) Match Workspace

Group CV(?<CV>\$*\w++\s*)

\$*the literal $ (36₁₀ / 44₈ / 24₁₆) , repeated any number of times

\w++any word character, repeated at least once

\s*any whitespace character, repeated any number of times

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2(\s*(?<PRM>(\g<0>)|(?<STRING>"(?:[^"\\]*(?:\\.[^"\\]*)*)"|'(?:[^'\\]*(?:\\.[^'\\]*)*)')|(\g<CV>))\s*(,\s*(\g<PRM>))*)?+

?+repeats the group contents below at most once:

\s*any whitespace character, repeated any number of times

Group PRM(?<PRM>(\g<0>)|(?<STRING>"(?:[^"\\]*(?:\\.[^"\\]*)*)"|'(?:[^'\\]*(?:\\.[^'\\]*)*)')|(\g<CV>))

1st Alternative(\g<0>)

Group 4(\g<0>)

\g<0>recurses into the entire pattern

2nd Alternative(?<STRING>"(?:[^"\\]*(?:\\.[^"\\]*)*)"|'(?:[^'\\]*(?:\\.[^'\\]*)*)')

Group STRING(?<STRING>"(?:[^"\\]*(?:\\.[^"\\]*)*)"|'(?:[^'\\]*(?:\\.[^'\\]*)*)')

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

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

Negated Character Class[^"\\]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

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

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

Negated Character Class[^"\\]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative'(?:[^'\\]*(?:\\.[^'\\]*)*)'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

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

Negated Character Class[^'\\]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

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

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

Negated Character Class[^'\\]*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

3rd Alternative(\g<CV>)

Group 6(\g<CV>)

\g<CV>calls group CV as a subroutine

\s*any whitespace character, repeated any number of times

Group 7(,\s*(\g<PRM>))*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Group 8(\g<PRM>)

\g<PRM>calls group PRM as a subroutine

\s*any whitespace character, repeated any number of times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

Search reference

Regular Expression

(?<CV>\$*\w++\s*)\s*\((\s*(?<PRM>(\g<0>)|(?<STRING>"(?:[^"\\]*(?:\\.[^"\\]*)*)"|'(?:[^'\\]*(?:\\.[^'\\]*)*)')|(\g<CV>))\s*(,\s*(\g<PRM>))*)?+\s*\)

New

bar("string"",bar($str,CONST,func($s,o))) //1
bar("string\",bar($str,CONST,func($s,o))) //2
bar("",bar($str,CONST,func($s,o))) //This regex is supported, but when I try to be compatible with both cases, the problem occurs

Regular Expressions 101

Regular Expression

Extraction