I really would like to see a sanitzer that uses a regex!!
$sanitize->regex($value, $regex);
Simply return empty if the value doesn't match.
It would be even better if we got an extra option for replacements and or callback functions. If i have seen it right, there are even sanitizer that use HTMLpurifier so why is there no regex implemented as its one of PHP's most powerfull features ?
Sanitizer since PW 2.6.14 integrates nicely whith $input and so on , so using a seperate preg_match()/preg_replace() isn't as elegant as using sanitizer.