array_diff_ukey

Function • Params and return types changed in PHP 8.0

Computes the difference of arrays using a callback function on the keys for comparison.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2

PHP 8.3

PHP 8.4

PHP 8.5

array_diff_ukey(array $array, ...$rest): array

Typearray

The array to compare from

Variadic, Optional

Arrays to compare against

Typearray

Returns an array containing all the entries from $array that are not present in any of the other arrays.

Changes to the `array_diff_ukey` Function

-array_diff_ukey(
-    $arr1,
-    $arr2,
-    $callback_key_comp_func
-  )
+array_diff_ukey(array $array, ...$rest): array