1
I read docs about regex_replace and referenced PHP's preg_replace(), but can't be sure if I understand all correctly.
Thus,
1 - Question
Can I use backreferences in regex_replace's searh string and parameters, something like
|regex_replace:"/.*\W(\w+)$/":"$1"
(extract in this case last word from a string)
2. Can anybody write modifier of function, which perform regex_extract with possibilities to use subpatterns?