<?php
$stack = array("orange", "banana", "apple", "raspberry");
$fruit = array_shift($stack);
print_r($stack);
?>
// Array
// (
// [0] => banana
// [1] => apple
// [2] => raspberry
// )
$arr = [1,2,3,4];
array_shift($arr);
print_r($arr); // [2,3,4]