How to convert an array to object in PHP?

Question

How can I convert an array like this to an object?

[128] => Array
    (
        [status] => "Figure A.
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Answer 1

Code

This function works as same as json_decode(json_encode($arr), false).

function arrayToObject(array $arr)
{
    $flat = array_keys($arr) === range(0, count($arr) - 1);
    $out = $flat ? [] : new \stdClass();

    foreach ($arr as $key => $value) {
        $temp = is_array($value) ? $this->arrayToObject($value) : $value;

        if ($flat) {
            $out[] = $temp;
        } else {
            $out->{$key} = $temp;
        }
    }

    return $out;
}

Testing

Test 1: Flat array

$arr = ["a", "b", "c"];
var_export(json_decode(json_encode($arr)));
var_export($this->arrayToObject($arr));

Output:

array(
    0 => 'a',
    1 => 'b',
    2 => 'c',
)
array(
    0 => 'a',
    1 => 'b',
    2 => 'c',
)

Test 2: Array of objects

$arr = [["a" => 1], ["a" => 1], ["a" => 1]];
var_export(json_decode(json_encode($arr)));
var_export($this->arrayToObject($arr));

Output:

array(
    0 => stdClass::__set_state(array('a' => 1,)),
    1 => stdClass::__set_state(array('a' => 1,)),
    2 => stdClass::__set_state(array('a' => 1,)),
)
array(
    0 => stdClass::__set_state(array('a' => 1,)),
    1 => stdClass::__set_state(array('a' => 1,)),
    2 => stdClass::__set_state(array('a' => 1,)),
)

Test 3: Object

$arr = ["a" => 1];
var_export(json_decode($arr));
var_export($this->arrayToObject($arr));

Output:

stdClass::__set_state(array('a' => 1,))
stdClass::__set_state(array('a' => 1,))