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<?php preg_match("@^x@", "xa", $m1, 0); var_dump($m1); preg_match("@^a@", "xa", $m2, 0, 1); var_dump($m2);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(1) "x" } array(0) { }

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