Question

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How to “flatten” a multi-dimensional array to simple one in PHP?

How to create an array of inner array values with array function ?

Here is array

Array
(
    [0] => Array
    (
        [Detail] => Array
        (
            [detail_id] => 1
        )

    )

    [1] => Array
    (
        [Detail] => Array
        (
            [detail_id] => 4
        )

    )

)

I want create an array with detail_id of above array i.e

array(1, 4)

Is it done any array function in PHP ?

Answer 1

I am looking for answer like this

$result = array_map( function($a) {
    return $a['Detail']['detail_id']; }, $mainArray
);

This works correct..