Question

Hello am new to array can someone help? i have array in array.
how can i get only all the [key] data from the [permissions] array.

 Array
(
    [name] => john
    [password] => 150211444
    [permissions] => Array
        (
            [0] => Array
                (
                    [key] => 2
                    [moduleId] => 13
                    [permission] => 1
                )

            [1] => Array
                (
                    [key] => 3
                    [moduleId] => 13
                    [permission] => 1
                )

            [2] => Array
                (
                    [key] => 8
                    [moduleId] => 13
                    [permission] => 1
                )

        )
    )

Answer 1

You could do

$keys = array();
foreach($arr['permissions'] as $key => $value){
    $keys[] = $value["key"]
}

and $keys is an array that contains all the [key] values