PHP - 用另一个不相同的数组替换数组的值

Question

Is there a way i can replace the values of one array with the values of another non identical array and obtain as result only the first (updated) array? For example:

$arr1 = Array
        (
            [key3] => var3
            [key4] => var4
        )
$arr2 = Array
        (
            [key1] => var1
            [key2] => var2
            [key3] => new_var
            [key4] => new_var
            [key5] => var5
            [key6] => var6
        )

I want to get:

$arr_result = Array
        (
            [key3] => new_var
            [key4] => new_var
        )

$arr_result = array_merge($arr1, $arr2)

is not the solution

Answer 1

In order to achieve this, you can use array_replace along with array_keys_intersect:

$result = array_intersect_key(array_replace($arr1, $arr2), $arr1);

Here is working demo.

However simply looping through the first array and replacing values yourself is more optimal in this case.