例如下面的数组，我要对name值进行排序
$arr = Array
(
[0] => Array
(
[id] => 16
[name] => 5
[message] => 5
[type] => touzhu
)
[1] => Array
(
[id] => 15
[name] => 15
[message] => 15
[type] => touzhu
)
[2] => Array
(
[id] => 14
[name] => 10
[message] => 10
[type] => touzhu
)
)
可对数组进行下面的操作：（如果数据是对象形式的需要先转化为数组格式）
array_multisort(array_column($arr,'name'),SORT_ASC,$arr);
其中 array_column(数组,数组中的某个键值) 从多维数组中取出某个键值的一列 返回一个一维数组；
array_multisort(数组(一维数组),排序方式(SOTR_ASC,SOTR_DESC),其他数组(可以是二维的))
输出结果为：Array
(
[0] => Array
(
[id] => 16
[name] => 5
[message] => 5
[type] => touzhu
)
[1] => Array
(
[id] => 15
[name] => 10
[message] => 10
[type] => touzhu
)
[2] => Array
(
[id] => 14
[name] => 15
[message] => 15
[type] => touzhu
)
)
