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Just simple question (I’ve google this but not found the answer). What’s the meaning of ?P
in this statement :
preg_match('/^posts\/(?P<id>\d+)$/', $url, $matches);
(?P<name>patt)is a named subpattern. It means that you can access the match for that subpattern by looking in$matches['id']as well as the usual$matches[1].