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 el

Answer 1

When one wants elements to be added with zero-based element indexing, I guess this will work as well:

// adding elements to an array with zero-based index
$matrix= array();
$matrix[count($matrix)]= 'element 1';
$matrix[count($matrix)]= 'element 2';
...
$matrix[count($matrix)]= 'element N';