PHP:从while循环+排序合并两个数组

In Wordpress, every WP_query returns with posts. (in current situation I have 2 posts) Every post contains some array. As a result I get two arrays and I need to merge them so I could Sort them later. So currently if I print:

echo "<pre>";
print_r($products_selected);
echo "</pre>";

I get This:

Array
(

    [0] => Array
        (
            [0] => http://www.page1.com
            [1] => Product 1
        )

    [1] => Array
        (
            [0] => http://www.page2.com
            [1] => Product 2

        )
)

Array 2:

Array
(

    [0] => Array
        (
            [0] => http://www.page3.com
            [1] => Product 3
        )

    [1] => Array
        (
            [0] => http://www.page4.com
            [1] => Product 4

        )
    [2] => Array
        (
            [0] => http://www.page5.com
            [1] => Product 5

        )

)

How do I merge them so I could sort by Product names ( [1] )

Example:

Array
(

    [0] => Array
        (
            [0] => http://www.page1.com
            [1] => Product 1
        )

    [1] => Array
        (
            [0] => http://www.page2.com
            [1] => Product 2

        )

    [2] => Array
        (
            [0] => http://www.page3.com
            [1] => Product 3
        )

    [3] => Array
        (
            [0] => http://www.page4.com
            [1] => Product 4

        )
    [4] => Array
        (
            [0] => http://www.page5.com
            [1] => Product 5

        )

)

you can achieve this exact result using the array_merge_recursive($ array1, $ array2)