Question

Given this array:

Array
(
[0] => Array
    (
        [title] => this is the newest post
        [ssm_featured_post_id] => 70
    )

[1] => Array
    (
        [title] => sdfsfsdf
        [ssm_featured_post_id] => 63
    )

[2] => Array
    (
        [title] => test
        [ssm_featured_post_id] => 49
    )

[3] => Array
    (
        [title] => Hello world!
        [ssm_featured_post_id] => 1
    )

)

The ssm_featured_post_id value corresponds to the value of the array items in the second array.
I want to order the first array items in the same order as the items in the second array

Array
(
    [1] => 63
    [0] => 70
    [3] => 1
    [2] => 49
)

so the result after sorting would be

Array
(
[0] => Array
    (

        [title] => sdfsfsdf
        [ssm_featured_post_id] => 63
    )

[1] => Array
    (
        [title] => this is the newest post
        [ssm_featured_post_id] => 70
    )

[2] => Array
    (
        [title] => Hello world!
        [ssm_featured_post_id] => 1

    )

[3] => Array
    (
        [title] => test
        [ssm_featured_post_id] => 49
    )

)

Answer 1

The simpler way would be to use usort and write a function that uses the second table to compare two values from first table.