Regular Expressions 101

Pro

@IFthe literal text @IF (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Atomic Group(?>(?!@IF$|$@).|(?<o>)@IF$|(?<-o>)$@)*

*repeats the group contents below any number of times:

1st Alternative(?!@IF$|$@).

Negative Lookahead(?!@IF$|$@)

1st Alternative@IF\(

@IFthe literal text @IF (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

2nd Alternative\)@

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

.any Unicode character (except for line terminators)

2nd Alternative(?<o>)@IF\(

Group o(?<o>) — does not consume characters

@IFthe literal text @IF (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

3rd Alternative(?<-o>)\)@

Balancing Group(?<-o>) — does not consume characters

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

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

@IF\((?>(?!@IF\(|\)@).|(?<o>)@IF\(|(?<-o>)\)@)*\)@

New

[@param_6@]  @IF(@param_5@==null;@param_5@;@IF(1==1;@param_2@;@param_4@)@)@ - @param_3@ - <@IF(@parameter_tag2@ == null;@param_4@;@param_5@)@>