Reset PHP Array Index

Question

The array_values() function ^[docs] does that:

$a = array(
    3 => "Hello",
    7 => "Moo",
    45 => "America"
);
$b = array_values($a);
print_r($b);

Array
(
    [0] => Hello
    [1] => Moo
    [2] => America
)

If you want to reset the key count of the array for some reason;

$array1 = [
  [3]  => 'Hello',
  [7]  => 'Moo',
  [45] => 'America'
];
$array1 = array_merge($array1);
print_r($array1);

Output:

Array(
  [0] => 'Hello',
  [1] => 'Moo',
  [2] => 'America'
)