重复PHP数组的钥匙

Question

我有两个数组，像这样：

[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 

所有我想要做的就是复制数组键，两个数组应该有相同的位置相同的密钥和保留，如果任何一个值。有什么建议么？

Answer 1

来自拿到钥匙，并把它们合并，然后翻转并与阵列合并：

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