Regular Expressions 101

Pro

Group 1(%n)

%nthe literal text %n (case sensitive)

Non-Capturing Group(?:([:+])(\d+)(?:(?!\2)([:+]\d+))?)?

?repeats the group contents below at most once:

Group 2([:+])

Character Class[:+]

:the literal : (58₁₀ / 72₈ / 3A₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

Group 3(\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:(?!\2)([:+]\d+))?

?repeats the group contents below at most once:

Negative Lookahead(?!\2)

\2the text saved by group 2

Group 4([:+]\d+)

Character Class[:+]

:the literal : (58₁₀ / 72₈ / 3A₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

\d+a digit, repeated at least once

Negative Lookahead(?!\S)

\Sany non-whitespace character

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

(%n)(?:([:+])(\d+)(?:(?!\2)([:+]\d+))?)?(?!\S)

New

%n:32+5000
%n:32
%n+5000
%n
%n+32:5000
%n+32
%n:5000
%n:32:5000
%n+32+5000