Question

An array

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

    )

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

    )

)

Is it possible to use implode function with above array, because I want to implode detail_id to get 1,4.

I know it is possible by foreach and appending the array values,
but want to know whether this is done by implode function or any other inbuilt function in PHP

Answer 1

If you need to use some logic – then array_reduce is what you need

$result = array_reduce($arr, function($a, $b) {
    $result = $b['Detail']['detail_id'];

    if (!is_null($a)) {
        $result = $a . ',' . $result;
    }

    return $result;
});

PS: for php <= 5.3 you need to create a separate callback function for that