array_intersect_ukey

Function • Params and return types changed in PHP 8.0

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

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

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

Typearray

Initial array for comparison of the arrays.

Variadic, Optional

Arrays to compare keys against.

Typearray

Returns the values of $array whose keys exist in all the arguments.

Changes to the `array_intersect_ukey` Function

-array_intersect_ukey(
-    $arr1,
-    $arr2,
-    $callback_key_compare_func
-  )
+array_intersect_ukey(array $array, ...$rest): array