Regular Expressions 101

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^[\]]+

+matches at least one character outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Positive Lookahead(?=[^[\]]*(\[[^[\]]+\])*[^[\]]*\])

Negated Character Class[^[\]]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group 1(\[[^[\]]+\])*

*repeats the group contents below any number of times:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negated Character Class[^[\]]+

+matches at least one character outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Negated Character Class[^[\]]*

*matches any number of characters outside the set below:

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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.

Search reference

Regular Expression

\[[^[\]]+\](?=[^[\]]*(\[[^[\]]+\])*[^[\]]*\])

New

[[hello] this should [match]] [not ok]