Regular expression for double parentheses

Question

De regular expression below is working fine to find all curly brackets ( '{' and '}' ). But I need to find double parentheses ( '((' and '))' )

/\{(((?>[^\{\}]+)|(?R))*)\}/x

Anyone who knows how to translate the above regular expression to that? It's necassary to find parentheses on multilevel. So It needs to find parentheses between parentheses as well.

Answer 1

It would be usefull to know which flavour of regular expressions you are using, but there is a good chance that you need to quote ( and ) characters, as they have special meaning. So replace ( with [(], and ) with [)], or use backslash to quote them.