How to add elements to an empty array in PHP?

tl;dr

Here's how to add elements to an empty array in PHP:

First, create an empty array:

    $cart = array();

To add elements to the array, you can use either the array_push() function or a for loop.

To use array_push(), simply pass the array and the elements you want to add as arguments:

    array_push($cart, 13);
    array_push($cart, 14);

Or, you can use a for loop to add elements to the array:

    for($i=0;$i<=5;$i++){
        $cart[] = $i;  
    }

Finally, you can print the array to check that the elements have been added:

    echo "<pre>";
    print_r($cart);
    echo "</pre>";