//冒泡排序法
$arr = array(3,55,45,2,67,76,6.7,-65,85,4);
function bubblingSort($arr){
    for ( $i=0; $i<count($arr);$i++ ){
        $flag = true;
        for ($j=0;$j<(count($arr)-1);$j++){
            if ( $arr[$j]>=$arr[$j+1] ){
                $transit_variable = $arr[$j];
                $arr[$j] = $arr[$j+1];
                $arr[$j+1] = $transit_variable;
                $flag = false;
            }
        }
        if ($flag){
            return $arr;
            break;
        }
    }
    return $arr;
}
$res = bubblingSort($arr);
echo "<pre>";print_r($res);