在php或mysql中使用内部数组排序数组
发布时间：2020-12-13 17:14:59 所属栏目：PHP教程 来源：网络整理
导读：我有一个像这样的数组, 数组[0] [0],[1] [0],[2] [0]是问题,数组[0] [1],[1] [1],[2] [1]是答案的问题. 现在我想根据答案的数量对这个数组进行排序. 第一个问题只有一个答案和 第二个有两个答案,第三个有三个答案. 排序的数组应该按照该问题的答案数降序排列
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我有一个像这样的数组,
数组[0] [0],[1] [0],[2] [0]是问题,数组[0] [1],[1] [1],[2] [1]是答案的问题. Array
(
[0] => Array
(
[0] => Array
(
[0] => 12
[1] => 110
[2] => Tom
[3] => Tom@gmail.com
[4] => Hello tom how are you?
[5] => 2013-01-03 14:54:07
)
[1] => Array
(
[0] => Array
(
[0] => 12
[1] => Yes i am fine.
[2] => Arun
[3] => arun@gmail.com
[4] => 2013-01-03 14:55:22
)
)
)
[1] => Array
(
[0] => Array
(
[0] => 12
[1] => 110
[2] => Tom
[3] => Tom@gmail.com
[4] => Hello tom how are you.
[5] => 2013-01-03 14:54:07
)
[1] => Array
(
[0] => Array
(
[0] => 12
[1] => Yes i am fine
[2] => Arun
[3] => arun@gmail.com
[4] => 2013-01-03 14:55:22
)
[1] => Array
(
[0] => 12
[1] => Yes i am fine
[2] => Arun
[3] => arun@gmail.com
[4] => 2013-01-03 14:55:22
)
)
)
[2] => Array
(
[0] => Array
(
[0] => 12
[1] => 110
[2] => Tom
[3] => Tom@gmail.com
[4] => Hello tom how are you.
[5] => 2013-01-03 14:54:07
)
[1] => Array
(
[0] => Array
(
[0] => 12
[1] => Yes i am fine
[2] => Arun
[3] => arun@gmail.com
[4] => 2013-01-03 14:55:22
)
[1] => Array
(
[0] => 12
[1] => Yes i am fine
[2] => Arun
[3] => arun@gmail.com
[4] => 2013-01-03 14:55:22
)
[2] => Array
(
[0] => 12
[1] => Yes i am fine
[2] => Arun
[3] => arun@gmail.com
[4] => 2013-01-03 14:55:22
)
)
)
解决方法
这应该工作：
function cmp($a,$b)
{
return count($a[1]) > count($b[1]) ? -1 : 1;
}
usort($data,'cmp');
或者,如果您使用的是PHP 5.3.0或更高版本,则可以使用： usort($data,function ($a,$b) {
return count($a[1]) > count($b[1]) ? -1 : 1;
});
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