关于数组合并的问题

[Aimis]

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 )
				)
		)
);

[xuzuning]

$res = array();
foreach($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 ( [col1] => A2 [col2] => 0 ) [2] => Array ( [col1] => A3 [col2] => 0 ) ) ) [1] => Array ( [0] => b [1] => Array ( [0] => Array ( [col1] => B1 [col2] => 1 ) ) ) )