regex101: PCRE (Legacy) Substitution Workspace

the literal (32₁₀ / 40₈ / 20₁₆)

Positive Lookahead(?=(?:(?:\\.|"(?:\\.|[^"\\])*"|[^\\'"])*'(?:\\.|"(?:\\.|[^"'\\])*"|[^\\'])*')*(?:\\.|"(?:\\.|[^"\\])*"|[^\\'])*$)

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

*repeats the group contents below any number of times:

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

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

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

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

2nd Alternative[^"\\]

Negated Character Class[^"\\]

"the literal " (34₁₀ / 42₈ / 22₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative[^\\'"]

Negated Character Class[^\\'"]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

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

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

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

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

2nd Alternative[^"'\\]

Negated Character Class[^"'\\]

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative[^\\']

Negated Character Class[^\\']

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

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

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

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

"the literal " (34₁₀ / 42₈ / 22₁₆)

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

*repeats the group contents below any number of times:

1st Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

2nd Alternative[^"\\]

"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative[^\\']

$end of string, or before its final line terminator

Positive Lookahead(?=(?:(?:\\.|'(?:\\.|[^'\\])*'|[^\\'"])*"(?:\\.|'(?:\\.|[^'"\\])*'|[^\\"])*")*(?:\\.|'(?:\\.|[^'\\])*'|[^\\"])*$)

Global pattern flags

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

Search reference

Regular Expression

 (?=(?:(?:\\.|"(?:\\.|[^"\\])*"|[^\\'"])*'(?:\\.|"(?:\\.|[^"'\\])*"|[^\\'])*')*(?:\\.|"(?:\\.|[^"\\])*"|[^\\'])*$)(?=(?:(?:\\.|'(?:\\.|[^'\\])*'|[^\\'"])*"(?:\\.|'(?:\\.|[^'"\\])*'|[^\\"])*")*(?:\\.|'(?:\\.|[^'\\])*'|[^\\"])*$)

New

"Hello", he said. "What's up, \"doc\"?", she replied. 
'I need a 12" crash cymbal', he reminded her. 
"2\" by 4 inches", 'Back\"\'slashes \\ are OK!'

key : string
dragon : "Felix's pet"
"Hello World" something here "Another String"

Regular Expressions 101

Regular Expression

Extraction