1 
      $arr[$j+1]){ 9                 //如果相邻的两个数组元素，前一个比后一个大，则交换位置10                 $temp = $arr[$j];11                 $arr[$j] = $arr[$j+1];12                 $arr[$j+1] = $temp;13             }14         }15     }16     return $arr;17 }18 $arr = array(5,9,3,6,4,8);19 //格式化输出20 echo "
";21 print_r(bubble($arr));22 23 /* 输出结果24  * 25  * Array26 (27     [0] => 328     [1] => 429     [2] => 530     [3] => 631     [4] => 832     [5] => 933 )34  */