Matches a subject against the pattern,
compatible with the old split method:
returns an array of the subpatterns,
or if there are no subpattern but still a match, ({0}).
Returns 0 if there was no match.
example:
> Regexp.PCRE.Plain("i\(.*\) is \(.*\)u")->split("pike is fun");
(1) Result: ({
"ke",
"f"
})
> Regexp.PCRE.Plain("is fun")->split("pike is fun");
(4) Result: ({
0
})