How to add elements to an empty array in PHP?

Question

If I define an array in PHP such as (I don't define its size):

$cart = array(); 

Do I simply add elements to it using the following?

$cart[] = 13; $cart[] = "foo"; $cart[] = obj; 

Don't arrays in PHP have an add method, for example, cart.add(13)?

Answer 1

Both array_push and the method you described will work.

$cart = array(); $cart[] = 13; $cart[] = 14; // etc  //Above is correct. but below one is for further understanding $cart = array(); for($i=0;$i<=5;$i++){     $cart[] = $i;   } echo "<pre>"; print_r($cart); echo "</pre>"; 

Is the same as:

<?php $cart = array(); array_push($cart, 13); array_push($cart, 14);  // Or  $cart = array(); array_push($cart, 13, 14); ?>