如何使用 php 对多维数组进行排序?
嗨,我必须在 desc 中对这个数组进行排序。使用 php 根据 ratingVal 进行排序。我该怎么办呢。
Array
(
[0] => Array
(
[rating_postid] => 26
[raCnt] => 6
[sRate] => 18
[ratingVal] => 3
)
[1] => Array
(
[rating_postid] => 714
[raCnt] => 3
[sRate] => 14
[ratingVal] => 4.6666666666667
)
[2] => Array
(
[rating_postid] => 14
[raCnt] => 4
[sRate] => 12
[ratingVal] => 3
)
[3] => Array
(
[rating_postid] => 290
[raCnt] => 2
[sRate] => 10
[ratingVal] => 5
)
[4] => Array
(
[rating_postid] => 194
[raCnt] => 2
[sRate] => 8
[ratingVal] => 4
)
[5] => Array
(
[rating_postid] => 134
[raCnt] => 2
[sRate] => 6
[ratingVal] => 3
)
[6] => Array
(
[rating_postid] => 707
[raCnt] => 1
[sRate] => 5
[ratingVal] => 5
)
)
Hi I have to sort this array in desc. order on the basis of ratingVal using php. How can I do that.
Array
(
[0] => Array
(
[rating_postid] => 26
[raCnt] => 6
[sRate] => 18
[ratingVal] => 3
)
[1] => Array
(
[rating_postid] => 714
[raCnt] => 3
[sRate] => 14
[ratingVal] => 4.6666666666667
)
[2] => Array
(
[rating_postid] => 14
[raCnt] => 4
[sRate] => 12
[ratingVal] => 3
)
[3] => Array
(
[rating_postid] => 290
[raCnt] => 2
[sRate] => 10
[ratingVal] => 5
)
[4] => Array
(
[rating_postid] => 194
[raCnt] => 2
[sRate] => 8
[ratingVal] => 4
)
[5] => Array
(
[rating_postid] => 134
[raCnt] => 2
[sRate] => 6
[ratingVal] => 3
)
[6] => Array
(
[rating_postid] => 707
[raCnt] => 1
[sRate] => 5
[ratingVal] => 5
)
)
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使用
usort
:对于升序,交换减法中的
$a
和$b
。usort
函数允许您创建自己的自定义排序函数Use
usort
:For ascending order, swap the
$a
and$b
in the subtraction.The
usort
function allows you to create your own custom sort function如果您从 mysql 数据库检索此数据(正如我所见,指定了 mysql 标签),您可以在查询中使用 ORDER BY 语句。
如果这不合适,您必须实现比较函数并使用 usort() 函数。
If you retrieve this data from mysql database (as I see, mysql tag is specified), you may use ORDER BY statement in your query.
If this is not suitable, you'll have to implement comparison function and use usort() function.
您已将代码标记为“php5.3”,因此我将给出特定于 5.3 的答案。
改编Harmen的代码:
这使用
usort
和 匿名函数,PHP 5.3 中的新增功能。You've tagged your code "php5.3", so I'm going to give a 5.3-specific answer.
Adapting Harmen's code:
This uses
usort
and anonymous functions, a new addition in PHP 5.3.