带键的重复php数组

Question

我有两个这样的数组：

[day0_units] => 0
[day1_units] => 12
[day1_start] => 08:00:00
[day1_end] => 11:00:00
[day2_units] => 12
[day2_start] => 07:00:00
[day2_end] => 11:00:00
[day3_units] => 0
[day4_units] => 12
[day4_start] => 10:00:00
[day4_end] => 12:00:00
[day5_units] => 12
[day5_start] => 08:00:00
[day5_end] => 03:00:00
[day6_units] => 0

[day0_units] => 0
[day0_start] => 10:00:00
[day0_end] => 01:00:00
[day1_units] => 12
[day1_start] => 08:00:00
[day1_end] => 11:00:00
[day2_units] => 12
[day2_start] => 07:00:00
[day2_end] => 11:00:00
[day3_units] => 0
[day3_start] => 
[day3_end] => 
[day4_units] => 12
[day4_start] => 10:00:00
[day4_end] => 12:00:00
[day5_units] => 12
[day5_start] => 08:00:00
[day5_end] => 03:00:00
[day6_units] => 0

我想要做的就是复制数组键，两个数组在相同位置应该具有相同的键，并保留值（如果有的话）。有什么建议吗？

Answer 1

从两者获取密钥并合并它们，然后翻转并与数组合并：

$keys = array_flip(array_merge(array_keys($array1), array_keys($array2)));
$array1 = array_merge($keys, $array1);
$array2 = array_merge($keys, $array2);