Regular Expressions 101

Group 1(['"])

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:(?!\1|\\).|\\.)*

*repeats the group contents below any number of times:

1st Alternative(?!\1|\\).

Negative Lookahead(?!\1|\\)

1st Alternative\1

\1the text saved by group 1

2nd Alternative\\

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character

2nd Alternative\\.

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character

\1the text saved by group 1

Global pattern flags

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

s modifier: single line. Allows a dot to match line terminators

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(['"])(?:(?!\1|\\).|\\.)*\1

New

Hello Colm "This is a test\\\\"
"This is also an NL test"
'And this has  an escaped quote don\'t  in it ' Blue Boy
"This has a single quote ' but doesn\' end the quote as it started with double quotes"

"line spanning with escaped quote at the end of a line\"
"

"Foo Bar" "Another Value" something else

Substitution

Subbed