使用右括号使正则表达式工作

Question

I have the following regex:

$regex = '/(?:(?:\b(?:pp|[Ww]ars|[\.!?)]?\s*f|vs)[\.!?)]\s))\Z/mu';

It matches with:

$string = 'Wars! ';

But I want it to match with the following scenario:

$string = 'Wars!) ';

I have added the closing bracket there but obviously I'm doing something wrong.

Answer 1

You can add a * quantifier to the last [.!?)] to match zero or more occurrences:

(?:(?:\b(?:pp|[Ww]ars|[.!?)]?\s*f|vs)[.!?)]*\s))\Z
                                           ^

See the regex demo

Also note that a . inside a character class does not have to be escaped to match a literal dot symbol.