Remove key from array if key is in another array

Question

I have two arrays

array1 (
    "akey1" => "dfksjhf"
    "akey2" => "adasjkgffs"
    "akey3" => "afkjhsafshfkah"
)

array2 (
    "akey2" => "could be anything..."
)

I am looking for a PHP function in which I can provide two arrays and the following will happen:

If both arrays have an identical key (regardless of data), then remove the key from array 1 and return the rest of array 1.

The if run function will return:

array3 (
    "akey1" => "dfksjhf"
    "akey3" => "afkjhsafshfkah"
)

Is there a PHP function that can do this already, and if not what would be the fastest and most efficient way to execute this function in PHP?

Many thanks

Answer 1

You are looking for : array_diff_key()

$array3 = array_diff_key($array1, $array2);

Answer 2

array_diff_key should work for you:

, 1, .

$new_array = array_diff_key($array_1, $array_2);

Answer 3

array_merge:

array_merge($array2, $array1);

array 2, 1

:

function RemoveDuplicates($array1, $array2)
{
    foreach($array1 as $key=>$value)
    {
        if(array_key_exists($key, $array2)) {
            unset($array1[$key]);
        }
    }
    return $array1;
}