regex101: PCRE (Legacy) Match Workspace

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

spoiler]the literal text spoiler] (case sensitive)

Group 1((?:[^\[]|\[(?!\/?spoiler])|(?R))+)

Non-Capturing Group(?:[^\[]|\[(?!\/?spoiler])|(?R))+

+repeats the group contents below at least once:

1st Alternative[^\[]

Negated Character Class[^\[]

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

2nd Alternative\[(?!\/?spoiler])

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Negative Lookahead(?!\/?spoiler])

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

spoiler]the literal text spoiler] (case sensitive)

3rd Alternative(?R)

(?R)recurses into the entire pattern

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

spoiler]the literal text spoiler] (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

U modifier: Ungreedy. Quantifiers are lazy by default. A trailing ? makes a quantifier greedy

25 tokens

Regular Expression

\[spoiler]((?:[^\[]|\[(?!\/?spoiler])|(?R))+)\[\/spoiler]

New

[b]Привет[/b], [i]друг[/i] я [del]вот [/del] решил написать письмо и проверить все ли работает.
[b]Привет[/b], [i]др[b]Привет[/b]г[/i] я 
[b]Пр[i]друг[/i]ивет[/b], [i]друг[/i] я 
[img]http://s017.radikal.ru/i407/1511/a2/1.png[/img]
http://site.in/talk/post40079.html
[url]http://site.in/talk/post40079.html[/url]
это спойлер
[spoiler]а тут[b]Привет[/b] спойлер в спойлере[spoiler]текст в спойлере[/spoiler][/spoiler]
смайлик [язык] и еще  [смущаюсь]

Regular Expressions 101

Regular Expression

Substitution