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

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[] = $i;  
}
echo "
";
print_r($cart);
echo "
";

Is the same as: