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<?php function test(string $str): void { if (preg_match('~a|(u(x))|(v(y))~', $str, $matches) === 1) { var_dump($matches); } } test("vy");
Output for git.master_jit, git.master, rfc.property-hooks
array(5) { [0]=> string(2) "vy" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(2) "vy" [4]=> string(1) "y" }

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