<?php
/**
 * Return an array as a natural list
 *
 * @author      Aidan Lister <aidan@php.net>
 * @version     1.0.0
 * @link        http://aidanlister.com/repos/v/function.natural_list.php
 * @param       array    $array    The array
 */
function natural_list($array)
{
    $array = array_values($array);
    
    if (count($array) > 1) {
        $last = array_pop($array);
        $str = implode(', ', $array);
        $str .= ', and ' . $last;
    } elseif (count($array) === 1) {
        $str = $array[0];
    } else {
        return '';
    }

    return $str;
}

?>