关于数组合并的有关问题

关于数组合并的问题
原数组:

$args1 = Array(

		'0' => array(

				'0' => 'a',

				'1' => array(

					'0' => array ( 'col1' => 'A1', 'col2' => 0 )

				)

		),

		'1' => array(

				'0' => 'b',

				'1' => array(

					'0' => array ( 'col1' => 'B1', 'col2' => 1 )

				)

		)

);

$args2 = Array(

		'0' => array(

				'0' => 'a',

				'1' => array(

					'0' => Array ( 'col1' => 'A2', 'col2' => 0 ), 

					'1' => Array ( 'col1' => 'A3', 'col2' => 0 ) 

				)

		)

);

目标数组：

Array(

		'0' => array(

				'0' => 'a',

				'1' => array(

					'0' => array ( 'col1' => 'A1', 'col2' => 0 ),

                                        '1' => Array ( 'col1' => 'A2', 'col2' => 0 ), 

					'2' => Array ( 'col1' => 'A3', 'col2' => 0 ) 

				)

		),

		'1' => array(

				'0' => 'b',

				'1' => array(

					'0' => array ( 'col1' => 'B1', 'col2' => 1 )

				)

		)

);

------解决方案--------------------

$res = array();

foreach($args1 as $item) $res[$item[0]] = $item;

foreach($args2 as $item) $res[$item[0]][1] = array_merge($res[$item[0]][1], $item[1]);



print_r(array_values($res));

Array
(
[0] => Array
(
[0] => a
[1] => Array
(
[0] => Array
(
[col1] => A1
[col2] => 0
)

[1] => Array
(