regex101: PCRE (Legacy) Match Workspace

Negative Lookbehind(?<!\\)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\{2})*

*repeats the group contents below any number of times:

\\{2}the literal \ (92₁₀ / 134₈ / 5C₁₆) , repeated exactly 2 times

%the literal % (37₁₀ / 45₈ / 25₁₆)

Negated Character Class[^\\%\r\n]*

*matches any number of characters outside the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\\[\w\W][^\\%\r\n]*)*

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Character Class[\w\W]

\wany word character

\Wany non-word character

Negated Character Class[^\\%\r\n]*

*matches any number of characters outside the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

\zend of string

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

25 tokens

Regular Expression

(?<!\\)(?:\\{2})*%[^\\%\r\n]*(?:\\[\w\W][^\\%\r\n]*)*\z

New

(a) last line % now with comment
(b) last line with escaped \%  and not treated
(c) last line withouth any special chars
(d) last line terminates with %
(e) last line terminates with escaped \%
(f) beginning % but even escaped \% is ignored

Extraction

(a) last line % now with comment
(b) last line with escaped \%  and not treated
(c) last line withouth any special chars
(d) last line terminates with %
(e) last line terminates with escaped \%
(f) beginning % but even escaped \% is ignored