Sort (Order) foreach results in Smarty

// libs/plugins/modifier.sortby.php:

<?php 
# sorts an array of named arrays by the supplied fields 
# code by dholmes at jccc d0t net 
# taken from http://au.php.net/function.uasort 
# modified by cablehead, messju and pscs at http://www.phpinsider.com/smarty-forum 
function array_sort_by_fields(&$data, $sortby){ 
static $sort_funcs = array(); 
if (empty($sort_funcs[$sortby])) 
{ 
$code = "$c=0;"; 
foreach (explode(',', $sortby) as $key) 
{ 
$d = '1'; 
if (substr($key, 0, 1) == '-') 
{ 
$d = '-1'; 
$key = substr($key, 1); 
} 
if (substr($key, 0, 1) == '#') 
{ 
$key = substr($key, 1); 
$code .= "if ( ( $c = ($a['$key'] - $b['$key'])) != 0 ) return $d * $c;n"; 
} 
else 
{ 
$code .= "if ( ($c = strcasecmp($a['$key'],$b['$key'])) != 0 ) return $d * $c;n"; 
} 
} 
$code .= 'return $c;'; 
$sort_func = $sort_funcs[$sortby] = create_function('$a, $b', $code); 
} 
else 
{ 
$sort_func = $sort_funcs[$sortby]; 
} 
@uasort($data, $sort_func); 
} 
# 
# Modifier: sortby - allows arrays of named arrays to be sorted by a given field 
# 
function smarty_modifier_sortby($arrData,$sortfields) { 
array_sort_by_fields($arrData,$sortfields); 
return $arrData; 
} 
?>

// Usage:

{foreach from=$results|@sortby:"itemid" item=foo}
{$foo.text}
{/foreach}