I want to remove duplicate keys from both arrays.
My code is
$arr1[22068] = array('ID' => 22068);
$arr1[22067] = array('ID' => 22067);
$arr2[22068] = array('ID' => 22068);
$arr2[22066] = array('ID' => 22066);
$arr = array_diff($arr1, $arr2);
var_dump($arr); //It outputs null.
The final array should look like this--
$arr[22066] = array('ID' => 22066);
$arr[22067] = array('ID' => 22067);
Any help is highly appreciated.
array_diff_key() is what you want.
$arr1[22068] = array('ID' => 22068);
$arr1[22067] = array('ID' => 22067);
$arr2[22068] = array('ID' => 22068);
$arr2[22066] = array('ID' => 22066);
// Get elements of array 1 which are not present in array 2
$unique_1 = array_diff_key($arr1, $arr2);
// Get elements of array 2 which are not present in array 1
$unique_2 = array_diff_key($arr2, $arr1);
// Merge unique values
$unique = $unique_1 + $unique_2;
$unique = $unique_1 + $unique_2; to preserve original numeric keys. array_merge will reset numeric keys 22067 and 22066 to 0 and 1
So array_diff will give you what's different in array1 vs array2, and will NOT work on multi-dimensional arrays. You can switch to array_key_diff, however, you'll run into a similar issue:
$arr1[22068] = array('ID' => 22068);
$arr1[22067] = array('ID' => 22067);
$arr2[22068] = array('ID' => 22068);
$arr2[22066] = array('ID' => 22066);
$arr = array_diff_key($arr1, $arr2);
var_dump($arr); //It outputs array(1) {[22067]=> array(1) { ["ID"]=> int(22067) } }
I'm not aware of a "magic" solution with the differences, however, you do have options, you can take the code above and add an extra line for:
$arr2 = array_diff_key($arr2, $arr1);
var_dump($arr2)
then merge $arr and $arr2, or you can just write a loop going through and comparing each item. Depending on size, scope, readability, etc will depend on the actual set
foreach()loop, but maybe some one will answer with a sexier solution