How to solve array merging problems

For array merging, please help me to have two arrays, for example, arr1 = array (& nbsp; & quot; name & quot ;=& gt; Wang xiao, & nbsp; & quot; qty & quot; = & gt; 2) arr2 = array (& nbsp; & quot; Qty & quot; = & gt; 4, & nbs
I have two arrays, for example:
Arr1 = array (
"Name" => Wang xiao,
"Qty" => 2
)

Arr2 = array (
"Qty" => 4,
"Memo" => description
)

The above two arrays are merged to achieve the following results:
Arr3 = array (
"Name" => Wang xiao,
"Qty" => 6,
"Memo" => description
)
Add Qty. Does PHP have direct function implementation? I cannot use array_merge, but I will replace the original Qty.

------ Solution --------------------
$ Arr = array_merge_recursive ($ arr1, $ arr2 );

$ Arr: Array
(
[Name] => Wang Xiaoyu
[Qty] => Array
(
[0] => 2
[1] => 4
)

[Memo] => description
)

But this is not what you want, so you have to write a function by yourself.
------ Solution --------------------
You can only write functions by yourself.
------ Solution --------------------
$ Arr = array_merge_recursive ($ arr1, $ arr2 );
$ Arr ['qty '] = array_sum ($ arr ['qty']);
------ Solution --------------------
No direct function implementation

However, if you use foreach, just a few lines of work, just write the function. What else do you need?