Intuitive sorting of arrays in PHP

gistfile1.php

<?php
// Predefined constants
define('DO_SORT_BY_VALUE', 1);
define('DO_SORT_BY_KEY', 2);

define('DO_SORT_ASC', 1);
define('DO_SORT_DESC', 2);
define('DO_SORT_NATURAL', 3);
define('DO_SORT_NATURAL_CASE', 4);
define('DO_SORT_RANDOM', 5);
define('DO_SORT_USER', 6);

function do_sort (array & $array)
{
    // Arguments
    $args          = func_get_args();
    $sort_by       = $args[1];
    $order         = $args[2];
    $preserve_keys = $args[3];
    $flags         = $args[4];

    // Some predefined behaviours
    switch ($order)
    {
        case DO_SORT_USER:
            // If user's sorting
            $function = $args[4];
            break;

        case DO_SORT_NATURAL:
        case DO_SORT_NATURAL_CASE:
            // Natural sortings are when keys are preserved
            $preserve_keys = TRUE;
            break;

        case DO_SORT_RANDOM:
            // Random is when keys are not preserved
            $preserve_keys = FALSE;
            break;
    }

    // Sorting
    switch ($sort_by)
    {
        case DO_SORT_BY_VALUE:
            if ( ! empty($preserve_keys))
            {
                switch ($order)
                {
                    case DO_SORT_ASC:
                        return asort($array, $flags);

                    case DO_SORT_DESC:
                        return arsort($array, $flags);

                    case DO_SORT_NATURAL:
                        return natsort($array);

                    case DO_SORT_NATURAL_CASE:
                        return natcasesort($array);

                    case DO_SORT_USER:
                        return uasort($array, $function);

                    default:
                        throw new Exception('Sorting order is wrong');
                }
            }
            else
            {
                switch ($order)
                {
                    case DO_SORT_ASC:
                        return sort($array, $flags);

                    case DO_SORT_DESC:
                        return rsort($array, $flags);

                    case DO_SORT_RANDOM:
                        return shuffle($array);

                    case DO_SORT_USER:
                        return usort($array, $function);

                    default:
                        throw new Exception('Sorting order is wrong');
                }
            }

        case DO_SORT_BY_KEY:
            switch ($order)
            {
                case DO_SORT_ASC:
                    return ksort($array, $flags);

                case DO_SORT_DESC:
                    return krsort($array, $flags);

                case DO_SORT_USER:
                    return uksort($array, $function);

                default:
                    throw new Exception('Sorting order is wrong');
            }

        default:
            throw new Exception('Sorting setting is wrong');
    }
}

/**
 * Some usage examples
 */
$array = array(3, 5, 1, 9, 2, 0, 4, 5, 8, 6, 7);

do_sort($array, DO_SORT_BY_VALUE, DO_SORT_ASC);
print 'Low to high by value: '.implode(',', $array).'<br>';

do_sort($array, DO_SORT_BY_VALUE, DO_SORT_DESC);
print 'High to low by value: '.implode(',', $array).'<br>';

do_sort($array, DO_SORT_BY_VALUE, DO_SORT_RANDOM);
print 'Random by value: '.implode(',', $array).'<br>';

// Our array is changed by random sort, so we set it again
$array = array(3, 5, 1, 9, 2, 0, 4, 5, 8, 6, 7);

do_sort($array, DO_SORT_BY_KEY, DO_SORT_ASC);
print 'Low to high by key: '.implode(',', $array).'<br>';

do_sort($array, DO_SORT_BY_KEY, DO_SORT_DESC);
print 'High to low by key: '.implode(',', $array).'<br>';