php - 按特定顺序对数组进行排序

Question

这个问题已经有答案了:

Sort multidimensional array by multiple columns (8 个回答)

已关闭 去年。

我有以下数组

Array
(
[0] => Array
    (
        [label] => Germany
        [conversions] => 1
    )

[1] => Array
    (
        [label] => United States
        [conversions] => 8
    )

[2] => Array
    (
        [label] => France
        [conversions] => 1
    )

[3] => Array
    (
        [label] => China
        [conversions] => 1
    )

[4] => Array
    (
        [label] => Philippines
        [conversions] => 1
    )

[5] => Array
    (
        [label] => Turkey
        [conversions] => 1
    )

)

我想对以下数组进行排序，首先通过转换(desc)，然后通过标签(asc)

输出将具有以下顺序:

United States
China
France
Germany
Philippines
Turkey

Answer 1

如果使用 >= PHP 5.3...

usort($arr, function($a, $b) {

   $diff = $b['conversions'] - $a['conversions'];

   if ( ! $diff) {
      return strcmp($a['label'], $b['label']);
   } 

   return $diff; 

});

使其与< PHP 5.3 一起工作相对简单。