PHP One level deeper in array each loop made

Question

I\'m trying to loop through one array, adding a new level to another array each time. Let me illustrate - variable $arr\'s values are different each time

$ar         


        

Answer 1

You can use references here:

$a = array("1","5","6");
$b = array();
$c =& $b;

foreach ($a as $k) {
    $c[$k] = array();
    $c     =& $c[$k];
}

outputs

Array 
    (
    [1] => Array
        (
            [5] => Array
                (
                    [6] => Array
                        (
                        )
                )
        )
)

To overwrite the last element with some other value, you can just add the line:

$c = 'blubber';

after the loop, because $c is a reference to the deepest array level, when the loop is finished.