How to find difference between two arrays?

Question

I have 2 arrays like this.

Array
(
[14] => 1
[15] => 1
[13] => 2
)

Array
(
[14] => 1
[15] => 1
[13] => 2
)

Here array key and value are same. If array key or value is different, I have to return error value. Like the second array is

Array
(
[12] => 1
[15] => 3
[13] => 2
)

2 arrays should be unique. If key or value not unique, it should return error.

$k=array_intersect($CARTS,$store_cart);

Answer 1

You can do that with array_diff the function returns you all entries from the first array which are not the same.

So you can check with count the return if its bigger then 0 for example. Then you know, that the array is not the same.