php add to start of array code example

Example 1: php add element to array first position

<?php
$queue = array("orange", "banana");
array_unshift($queue, "apple", "raspberry");
print_r($queue);
?>
  Array
(
    [0] => apple
    [1] => raspberry
    [2] => orange
    [3] => banana
)

Example 2: php add to array

$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>";