\[the literal [ (9110 / 1338 / 5B16)
codethe literal text code (case sensitive) Non-Capturing Group(?:=(["']?)(.{0,50}?)\1)? ?repeats the group contents below at most once:
=the literal = (6110 / 758 / 3D16)
?matches at most one character from the set below:
"the literal " (3410 / 428 / 2216)
'the literal ' (3910 / 478 / 2716)
.{0,50}?any character (except for line terminators), repeated between 0 and 50 times
\1the text saved by group 1
\]the literal ] (9310 / 1358 / 5D16)
Negative Lookahead(?!\s*\[\/code\]) \s*any whitespace character, repeated any number of times
\[the literal [ (9110 / 1338 / 5B16)
\/the literal / (4710 / 578 / 2F16)
codethe literal text code (case sensitive) \]the literal ] (9310 / 1358 / 5D16)
.+?any character (except for line terminators), repeated at least once
\[the literal [ (9110 / 1338 / 5B16)
\/the literal / (4710 / 578 / 2F16)
codethe literal text code (case sensitive) \]the literal ] (9310 / 1358 / 5D16)
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