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<?php $pattern = "#^/([a-z]{2})/([a-zA-Z0-9_-]++)/([a-zA-Z0-9_-]++)(/.*+)?+[/]{0,1}$#"; $subject = '/en/user/login/foo/'; var_dump(preg_match($pattern, $subject, $matches), $matches); $subject = '/en/user/login'; var_dump(preg_match($pattern, $subject, $matches), $matches);
Output for 4.3.0 - 7.1.0
int(1) array(5) { [0]=> string(19) "/en/user/login/foo/" [1]=> string(2) "en" [2]=> string(4) "user" [3]=> string(5) "login" [4]=> string(5) "/foo/" } int(1) array(4) { [0]=> string(14) "/en/user/login" [1]=> string(2) "en" [2]=> string(4) "user" [3]=> string(5) "login" }