php 冒泡排序法

<?php// 冒泡（起泡）排序法$arr=array(0,1,2,3,4,5,6,7,8,9);$count=count($arr);for($i=0;$i<$count;$i++ ){    for($j=0; $j<$count-$i-1; $j++){        if($arr[$j] < $arr[$j+1]){             $tmp=$arr[$j];             $arr[$j]= $arr[$j+1];             $arr[$j+1]=$tmp;        }    }}print_r($arr);