浅谈php冒泡排序

function bubble_sort($array) {
    for ($i = 0; $i         for ($j = 0; $j             if ($array[$j] > $array[$j + 1]) {    //按升序排序
                $temp = $array[$j];
                $array[$j] = $array[$j + 1];
                $array[$j + 1] = $temp;
            }
        }
    }
    return $array;
}

$a = array(5, 1, 4, 7);