合并二维数组的问题

$a = array (  '108-3752685-0517825' =>   array (    0 => '6300-00',  ),  '107-5010391-7170621' =>   array (    0 => '0054-00',  ),  '105-5621773-8281824' =>   array (    0 => '0049-00',  ),);$b = array (  '2200320000123' =>   array (    0 => '0054-00',  ),  '2200320123501' =>   array (    0 => '0049-00',  ),  '220032012395200' =>   array (    0 => '0049-00',  ),);$t = array_merge($a, $b);print_r($t);

Array(    [108-3752685-0517825] => Array        (            [0] => 6300-00        )    [107-5010391-7170621] => Array        (            [0] => 0054-00        )    [105-5621773-8281824] => Array        (            [0] => 0049-00        )    [2200320000123] => Array        (            [0] => 0054-00        )    [2200320123501] => Array        (            [0] => 0049-00        )    [220032012395200] => Array        (            [0] => 0049-00        ))

$new_order_list=GetSaleOrder('new',1);$re_order_list=GetSaleOrder('re',1);$order_list=array_merge( $new_order_list, $re_order_list );print_r($new_order_list);print_r($re_order_list);print_r($order_list);

Array ( [250-5564686-0137465] => Array ( [0] => 6677-00 ) [250-1149332-5735041] => Array ( [0] => 6650-01 ) [108-3752685-0517825] => Array ( [0] => 6300-00 ) [107-5010391-7170621] => Array ( [0] => 0054-00 ) [105-5621773-8281824] => Array ( [0] => 0049-00 ) ) Array ( [2200320000123] => Array ( [0] => 0054-00 ) [2200320123501] => Array ( [0] => 0049-00 ) [220032012395200] => Array ( [0] => 0049-00 ) ) Array ( [250-5564686-0137465] => Array ( [0] => 6677-00 ) [250-1149332-5735041] => Array ( [0] => 6650-01 ) [108-3752685-0517825] => Array ( [0] => 6300-00 ) [107-5010391-7170621] => Array ( [0] => 0054-00 ) [105-5621773-8281824] => Array ( [0] => 0049-00 ) [0] => Array ( [0] => 0054-00 ) [1] => Array ( [0] => 0049-00 ) [2] => Array ( [0] => 0049-00 ) )