PHP 如何先按键然后按值对关联数组进行排序？

Question

$arr =array(
    28 => 23,
    26 => 23,
    15 => 12,
    29 => 12,
    1 => 12,
    16 => 15,
    30 => 15,
    11 => 12,
    8 => 23,
    33 => 23
);

如何排序:

8 => 23
26 => 23
28 => 23
33 => 23
16 => 15
30 => 15
1 => 12
11 => 12
15 => 12
29 => 12

Answer 1

使用uksort , 但使数组可用于比较函数以按值进行二次比较。将其设为全局变量将是最快且最肮脏的方式。