PHP - replace values of array with another array

Question

Is there a way i can replace the values of one array with the values of another which has identical keys?

$arr1 = Array
        (
            [key1] => var1
            [key2] => var2
        )
$arr2 = Array
        (
            [key1] => var3
            [key2] => var4
        )

I want to change $arr1's values to the ones in $arr2 im doing this about 10 times, and i can do it line by line, but im wondering if there's a simpler way. Thanks!

Answer 1

Check php's array_merge() function.

$arr1 = array_merge($arr1,$arr2);

Answer 2

You can try this:

$new_array = array_combine($arr1, $arr2);

Answer 3

If the keys in array 1 and 2 are identical:

$arr1 = $arr2;

If all keys of array 2 are guaranteed to be in array 1 (array 2 is a subset of array 1):

$arr1 = array_merge($arr1, $arr2);

If some keys of array 2 are not in array 1 and you want only the keys that are in array 1 to be replaced (array 2 is not a subset of array 1, and you only want to merge the intersecting part):

$arr1 = array_merge($arr1, array_intersect_key($arr2, $arr1));