function toggle_sort(&$a) {
$i = 0;
$lastindex = count($a) - 1;
while ($i < $lastindex) {
if ($a[$i] <= $a[$i+1]) {
$i++;
} else {
$tmp = $a[$i];
$a[$i] = $a[$i+1];
$a[$i+1] = $tmp;
if ($i) { $i--; }
}
}
}
$values = array(7, 3, 4, 6, 1);
toggle_sort($values);
foreach ($values as $v) { echo "{$v} "; }
?>