<!DOCTYPE html>
<html>
<body>
<pre>
<?php
$cars = [];
$cars[0] = "Volvo";
$cars[1] = "BMW";
$cars[2] = "Toyota";
var_dump($cars);
?>
</pre>
</body>
</html>
array(3) { [0]=> string(5) "Volvo" [1]=> string(3) "BMW" [2]=> string(6) "Toyota" }