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<?php preg_match('#^([a-z\\d_]+)\\.(twig)$#', 'foo.twig', $m); var_dump($m);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(8) "foo.twig" [1]=> string(3) "foo" [2]=> string(4) "twig" }

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