Merge branch '6.x'

Author: danog

stubs/CoreGenericFunctions.phpstub

@@ -1653,6 +1653,12 @@ function is_a($object_or_class, string $class, $allow_string = false): bool{}
  */
 function mb_convert_encoding(array|string $string, string $to_encoding, array|string|null $from_encoding = null): array|string|false{}
 
+/**
+ * @param int|"none"|"long"|"entity"|null $substitute_character
+ * @return ($substitute_character is null ? (int|"none"|"long"|"entity") : bool)
+ */
+function mb_substitute_character(string|int|null $substitute_character = null): string|int|bool {}
+
 /**
  * @template TRead of null|array<array-key, resource>
  * @template TWrite of null|array<array-key, resource>

stubs/Php81.phpstub

@@ -42,7 +42,7 @@ namespace {
     class ReflectionProperty implements Reflector
     {
         /**
-         * Starting from PHP 8.1, this method is pure, and has no effect.
+         * @deprecated Starting from PHP 8.1, this method is pure, and has no effect.
          *
          * @psalm-pure
          */
@@ -52,7 +52,7 @@ namespace {
     class ReflectionMethod extends ReflectionFunctionAbstract
     {
         /**
-         * Starting from PHP 8.1, this method is pure, and has no effect.
+         * @deprecated Starting from PHP 8.1, this method is pure, and has no effect.
          *
          * @psalm-pure
          */