Regular Expressions 101

{start}the literal text {start} (case sensitive)

Group 1((?:(?:(?!{(?:start|end)}).)+|(?R))*)

Non-Capturing Group(?:(?:(?!{(?:start|end)}).)+|(?R))*

*repeats the group contents below any number of times:

1st Alternative(?:(?!{(?:start|end)}).)+

Non-Capturing Group(?:(?!{(?:start|end)}).)+

+repeats the group contents below at least once:

Negative Lookahead(?!{(?:start|end)})

{the literal { (123₁₀ / 173₈ / 7B₁₆)

Non-Capturing Group(?:start|end)

1st Alternativestart

startthe literal text start (case sensitive)

2nd Alternativeend

endthe literal text end (case sensitive)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

.any character (except for line terminators)

2nd Alternative(?R)

(?R)recurses into the entire pattern

{end}the literal text {end} (case sensitive)

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

Regular Expression

{start}((?:(?:(?!{(?:start|end)}).)+|(?R))*){end}

New

{start} SubPa{1}ttern1 {end} 
....
{start} SubPattern2 {end}
....
{start} {start}SubPattern3{end} {end}
{start}{start} {start}SubPattern3{end} {end}{end}

{start}SubPattern1{end}{start}SubPattern2{end}{start}{start}SubPattern3{end}{end}

{start} SubPattern1 {end} 
{start} SubPattern2 {end}
{start} {start}SubPattern3{end} {end}