PHP – how to convert array of values to array with nested keys from values of first array?

I have this array:

$input = ['a', 'b', 'c', 'd'];

the output should be:

$output = convertArrayValues($input, 'final');

$output['a']['b']['c']['d'] = 'final;

I need code for convertArrayValues() method which will do the job of converting:

$input = ['a', 'b', 'c', 'd'];

into:

 $output['a']['b']['c']['d'] = 'final;

Dumped array input:

array:4 [
  0 => "a"
  1 => "b"
  2 => "c"
  3 => "d"
]

Dumped array output:

array:1 [
  "a" => array:1 [
    "b" => array:1 [
      "c" => array:1 [
        "d" => 'final
      ]
    ]
  ]
]

>Solution :

Will this help?

function convertArrayValues($input, $value) {
    $output = [];
    $temp = &$output; // reference to the output array 

    foreach ($input as $key) {
        $temp[$key] = []; // create or set a nested array if it's the last item
        $temp = &$temp[$key]; // update reference to point to the newly created array
    }

    $temp = $value; // final value

    return $output;
}

convertArrayValues($input, 'final');