php 按 DESC 顺序对数组进行排序
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sort array in DESC order
提问by antpaw
How can i sort this array by arrray key
我如何通过数组键对这个数组进行排序
array(
4 => 'four',
3 => 'three',
2 => 'two',
1 => 'one',
)
like this
像这样
array(
1 => 'one',
2 => 'two',
3 => 'three',
4 => 'four',
)
回答by Alix Axel
If you want to sort the keys in DESC order use:
如果要按 DESC 顺序对键进行排序，请使用：
krsort($arr);
If you want to sort the values in DESC order and maintain index association use:
如果要按 DESC 顺序对值进行排序并维护索引关联，请使用：
arsort($arr);
If you want to sort the values in DESC natural order and maintain index association use:
如果要按 DESC 自然顺序对值进行排序并维护索引关联，请使用：
natcasesort($arr);
$arr = array_reverse($arr, true);
回答by Gumbo
If you just want to reverse the order, use array_reverse:
如果您只想颠倒顺序，请使用array_reverse：
$reverse = array_reverse($array, true);
The second parameter is for preserving the keys.
第二个参数用于保留密钥。
回答by Pascal MARTIN
You have an array, you want to sort it by keys, in reverse order -- you can use the krsortfunction :
您有一个数组，您想按相反的顺序按键对其进行排序 - 您可以使用该krsort函数：
Sorts an array by key in reverse order, maintaining key to data correlations. This is useful mainly for associative arrays.
以相反的顺序按键对数组进行排序，保持数据相关性的键。这主要用于关联数组。
In you case, you'd have this kind of code :
在你的情况下，你会有这样的代码：
$arr = array(
1 => 'one',
2 => 'two',
3 => 'three',
4 => 'four',
);
krsort($arr);
var_dump($arr);
which would get you this kind of output :
这会让你得到这种输出：
$ /usr/local/php-5.3/bin/php temp.php
array(4) {
[4]=>
string(4) "four"
[3]=>
string(5) "three"
[2]=>
string(3) "two"
[1]=>
string(3) "one"
}
As a sidenode : if you had wanted to sort by values, you could have used arsort-- but it doesn't seem to be what you want, here.
作为一个sidenode：如果你想按值排序，你可以使用arsort- 但它似乎不是你想要的，在这里。
