Snippet on how to reset the array keys

snippet.php

<?php
// ...

} elseif ($input == 'R') {
    // Remove which item?
    echo 'Enter item number to remove: ';
    // Get array key
    $key = trim(fgets(STDIN));
    while ($key < count($items)) {
        $items[$key - 1] = $items[$key];
        $key++;
    }
    // Remove from array
    unset($items[$key - 1]);
}

// ...