Fix required number of arguments in stubs

* get_parent_class() argument is optional
* Mark array_filter() $callback as optional
* The $base of gmp_strval() is optional
* DateTime constructor also accepts zero arguments
* hash_update_file() stream context is optional
* xmlwriter_write_dtd_entity() $isparam argument is optional

1 files changed, 1 insertions, 1 deletions

diff --git a/Zend/zend_builtin_functions.stub.php b/Zend/zend_builtin_functions.stub.php
index deb9ac9294..c3052db108 100644
--- a/Zend/zend_builtin_functions.stub.php
+++ b/Zend/zend_builtin_functions.stub.php
@@ -30,7 +30,7 @@ function get_class(object $object = UNKNOWN) {}
 function get_called_class() {}
 
 /** @return string|false */
-function get_parent_class($object) {}
+function get_parent_class($object = UNKNOWN) {}
 
 function is_subclass_of($object, string $class_name, bool $allow_string = true): bool {}