preg_replace regex for（123）：

I'm looking for a preg_replace regex that will match and remove

(123):

and

(+12):

I've tried a few including

$str = preg_replace('/([0-9]+)/s', '', $str);

but none I've tried have removed the () brackets/parentheses nor the + sign

(yes I realise the + in the regex means plus/continue not an actual + sign) ;)

You need to escape the parenthesis and add the + sign to your character group:

$str = preg_replace('/\([+0-9]+\)/s', '', $str);