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<?php $arr1 = [3 => 1, 6 => 1, 9 => 1]; $arr2 = [3 => 2, 6 => 2, 9 => 2]; var_dump(array_merge($arr1, $arr2));
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> int(1) [1]=> int(1) [2]=> int(1) [3]=> int(2) [4]=> int(2) [5]=> int(2) }

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