diff --git a/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub b/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub
index b970253d187..07198ae7285 100644
--- a/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub
+++ b/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub
@@ -49,6 +49,25 @@ function array_intersect_key(array $arr, array $arr2, array ...$arr3)
  * @psalm-template TValue
  *
  * @param array<TKey, TValue> $arr
+ * @param array $arr2
+ * @param array ...$arr3
+ * @param callable(TKey): int $keyCompareFunc
+ *
+ * @return array<TKey, TValue>
+ *
+ * @psalm-pure
+ */
+function array_intersect_ukey(array $arr, array $arr2, array ...$arr3, callable $keyCompareFunc): array
+{
+}
+
+/**
+ * @psalm-template TKey as array-key
+ * @psalm-template TValue
+ *
+ * @param array<TKey, TValue> $arr
+ * @param array $arr2
+ * @param array ...$arr3
  *
  * @return array<TKey, TValue>
  * @psalm-pure
@@ -57,6 +76,23 @@ function array_intersect_assoc(array $arr, array $arr2, array ...$arr3)
 {
 }
 
+/**
+ * @psalm-template TKey as array-key
+ * @psalm-template TValue
+ *
+ * @param array<TKey, TValue> $arr
+ * @param array $arr2
+ * @param array ...$arr3
+ * @param callable(TKey): int $keyCompareFunc
+ *
+ * @return array<TKey, TValue>
+ *
+ * @psalm-pure
+ */
+function array_intersect_uassoc(array $arr, array $arr2, array ...$arr3, callable $keyCompareFunc): array {}
+{
+}
+
 /**
  * @psalm-template TKey as array-key
  * @psalm-template TValue
@@ -102,6 +138,22 @@ function array_diff_key(array $arr, array $arr2, array ...$arr3)
 {
 }
 
+/**
+ * @psalm-template TKey as array-key
+ * @psalm-template TValue
+ *
+ * @param array<TKey, TValue> $arr
+ * @param array $arr2
+ * @param array ...$arr3
+ * @param callable(TKey, TKey): int $keyCompareFunc
+ *
+ * @return array<TKey, TValue>
+ * @psalm-pure
+ */
+function array_diff_ukey(array $arr, array $arr2, array ...$arr3, callable $keyCompareFunc): array {}
+{
+}
+
 /**
  * @psalm-template TKey as array-key
  * @psalm-template TValue
@@ -117,6 +169,20 @@ function array_diff_assoc(array $arr, array $arr2, array ...$arr3)
 {
 }
 
+/**
+ * @psalm-template TKey as array-key
+ * @psalm-template TValue
+ *
+ * @param array<TKey, TValue> $arr
+ * @param array $arr2
+ * @param array ...$arr3
+ * @param callable(TKey, TKey): int $keyCompareFunc
+ *
+ * @return array<TKey, TValue>
+ * @psalm-pure
+ */
+function array_diff_uassoc(array $arr, array $arr2, array ... $arr3, callable $keyCompareFunc): array {}
+
 /**
  * @psalm-template TKey as array-key
  * @psalm-template TValue
@@ -550,6 +616,20 @@ function explode(string $delimiter, string $string, int $limit = -1) : array {}
  */
 function array_sum(array $input) {}
 
+/**
+ * @param array $input
+ *
+ * @return (
+ *     $input is array<int>
+ *     ? int
+ *     : ($input is array<float>
+ *         ? float
+ *         : float|int
+ *     )
+ * )
+ */
+function array_product(array $input) {}
+
 /**
  * @psalm-pure
  *
@@ -736,3 +816,14 @@ function str_getcsv(string $input, string $delimiter = ',', string $enclosure =
  * @return ($min is positive-int ? positive-int : int)
  */
 function random_int(int $min, int $max): int {}
+
+/**
+ * @template TKey as array-key
+ *
+ * @param array<mixed, TKey> $array
+ *
+ * @return array<TKey, positive-int>
+ *
+ * @psalm-pure
+ */
+function array_count_values(array $array): array {}