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<?php $arr1 = [['item1', 'update']]; $arr2 = [['item2', 'create']]; $arr3 = [['item2', 'update']]; var_dump(array_merge($arr1, $arr2)); var_dump($arr1[] = $arr2); var_dump(array_merge($arr2, $arr3));

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21.09 ms | 402 KiB | 5 Q