Getting the key of the end of an array

<?php

//usefull for deleting dynamic input

$array = array(
    '0' => 123,
    '1' => 456,
    '2' => 789,
    '3'=> 1111,
);

$te = end($array);         // move the internal pointer to the end of the array
$key = key($array);  // fetches the key of the element pointed to by the internal pointer

var_dump($key);
var_dump($te);
?>