PHP实现冒泡排序

function msort($array){
$length = count($array);
for($i=0; $i<$length; $i++){
for($j=0; $j<$length-$i-1; $j++){
if($array[$j]>$array[$j+1]){
$tmp = $array[$j];
$array[$j] = $array[$j+1];
$array[$j+1] = $tmp;
}
}
}
return $array;
}

$arr = array(2,8,9,13,53,21,0,3,5,7);
$new = msort($arr);
print_r($new);