In PHP, how can I iterate through an array and change the key dynamically?

Question

I have an array $people. When I do print_r($people), I get the following results:

[people] => Array
(
  [500] => Array
          (
              [firstName] => Fred
              [age] => 19
          )

  [501] => Array
          (
               [firstName] => Bob
               [age] => 12
          )
  [502] => Array
          (
               [firstName] => Steve
               [age] => 52
          )
)

I want to change all the keys to look more "normal", starting at 0, then 1, 2 etc. How can I achieve this? To clarify, I want the resulting array to look like this:

    [people] => Array
(
  [0] => Array
          (
              [firstName] => Fred
              [age] => 19
          )

  [1] => Array
          (
               [firstName] => Bob
               [age] => 12
          )
  [2] => Array
          (
               [firstName] => Steve
               [age] => 52
          )
)

Answer 1

The built-in function array_values() will take only the values from an array, ignoring the keys and instead returning the array renumbered from zero.

$people = array_values($people);

Answer 2

Simply like this:

foreach ($people as $value) {
  $people_new[] = $value;
}

Answer 3

Try this

$people['people'] = array_values($people['people']);
print_r($people);