Regular Expressions 101

Pro

^start of line

Group 1(``|,,|")

1st Alternative``

``the literal text ``

2nd Alternative,,

,,the literal text ,,

3rd Alternative"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 2((?:(?!"|'{2}|`{2}|,{2}).)*)

Non-Capturing Group(?:(?!"|'{2}|`{2}|,{2}).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!"|'{2}|`{2}|,{2})

1st Alternative"

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative'{2}

'{2}the literal ' (39₁₀ / 47₈ / 27₁₆) , repeated exactly 2 times

3rd Alternative`{2}

`{2}the literal ` (96₁₀ / 140₈ / 60₁₆) , repeated exactly 2 times

4th Alternative,{2}

,{2}the literal , (44₁₀ / 54₈ / 2C₁₆) , repeated exactly 2 times

.any character (except for line terminators)

Group 3(''|``|")

1st Alternative''

''the literal text ''

2nd Alternative``

``the literal text ``

3rd Alternative"

"the literal " (34₁₀ / 42₈ / 22₁₆)

$end of line

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

Detailed match information will be displayed here automatically.

25 tokens

^(``|,,|")((?:(?!"|'{2}|`{2}|,{2}).)*)(''|``|")$

``Some question is here ,some text here''
``Some question is here ,,some text here''

``Some question is here ,some text here''
``Some question is here ,,some text here''