<?php $cars[0] = "Volvo"; $cars[1] = "BMW"; $cars[2] = "Toyota"; array_push($cars, "Ford"); var_dump($cars); ?>
array(4) { [0]=> string(5) "Volvo" [1]=> string(3) "BMW" [2]=> string(6) "Toyota" [3]=> string(4) "Ford" }