diff --git a/Zend/tests/010.phpt b/Zend/tests/010.phpt
index a4a862cac220..351398ecfa85 100644
--- a/Zend/tests/010.phpt
+++ b/Zend/tests/010.phpt
@@ -32,12 +32,37 @@ var_dump(get_parent_class("bar"));
 var_dump(get_parent_class("foo"));
 var_dump(get_parent_class("i"));
 
-var_dump(get_parent_class(""));
-var_dump(get_parent_class("[[[["));
-var_dump(get_parent_class(" "));
+try {
+    get_parent_class("");
+} catch (TypeError $exception) {
+    echo $exception->getMessage() . "\n";
+}
+
+try {
+    get_parent_class("[[[[");
+} catch (TypeError $exception) {
+    echo $exception->getMessage() . "\n";
+}
+
+try {
+    get_parent_class(" ");
+} catch (TypeError $exception) {
+    echo $exception->getMessage() . "\n";
+}
+
 var_dump(get_parent_class(new stdclass));
-var_dump(get_parent_class(array()));
-var_dump(get_parent_class(1));
+
+try {
+    get_parent_class(array());
+} catch (TypeError $exception) {
+    echo $exception->getMessage() . "\n";
+}
+
+try {
+    get_parent_class(1);
+} catch (TypeError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 
 echo "Done\n";
 ?>
@@ -50,10 +75,10 @@ bool(false)
 string(3) "foo"
 bool(false)
 bool(false)
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
 bool(false)
-bool(false)
-bool(false)
-bool(false)
-bool(false)
-bool(false)
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, array given
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, int given
 Done
diff --git a/Zend/zend_API.h b/Zend/zend_API.h
index 9744612ac746..39c4be3e0d02 100644
--- a/Zend/zend_API.h
+++ b/Zend/zend_API.h
@@ -1217,6 +1217,8 @@ static zend_always_inline zval *zend_try_array_init(zval *zv)
 	_(Z_EXPECTED_STRING_OR_ARRAY_OR_NULL, "of type string|array|null") \
 	_(Z_EXPECTED_STRING_OR_LONG,	"of type string|int") \
 	_(Z_EXPECTED_STRING_OR_LONG_OR_NULL, "of type string|int|null") \
+	_(Z_EXPECTED_CLASS_NAME_OR_OBJECT,	"a valid class name or object") \
+	_(Z_EXPECTED_CLASS_NAME_OR_OBJECT_OR_NULL, "a valid class name, object, or null") \
 
 #define Z_EXPECTED_TYPE
 
@@ -1395,6 +1397,20 @@ ZEND_API ZEND_COLD void ZEND_FASTCALL zend_argument_value_error(uint32_t arg_num
 #define Z_PARAM_CLASS(dest) \
 	Z_PARAM_CLASS_EX(dest, 0, 0)
 
+#define Z_PARAM_CLASS_NAME_OR_OBJ_EX(dest, allow_null) \
+	Z_PARAM_PROLOGUE(0, 0); \
+	if (UNEXPECTED(!zend_parse_arg_class_name_or_obj(_arg, &dest, _i, allow_null))) { \
+		_expected_type = allow_null ? Z_EXPECTED_CLASS_NAME_OR_OBJECT_OR_NULL : Z_EXPECTED_CLASS_NAME_OR_OBJECT; \
+		_error_code = ZPP_ERROR_WRONG_ARG; \
+		break; \
+	}
+
+#define Z_PARAM_CLASS_NAME_OR_OBJ(dest) \
+	Z_PARAM_CLASS_NAME_OR_OBJ_EX(dest, 0);
+
+#define Z_PARAM_CLASS_NAME_OR_OBJ_OR_NULL(dest) \
+	Z_PARAM_CLASS_NAME_OR_OBJ_EX(dest, 1);
+
 /* old "d" */
 #define Z_PARAM_DOUBLE_EX2(dest, is_null, check_null, deref, separate) \
 		Z_PARAM_PROLOGUE(deref, separate); \
@@ -1513,6 +1529,9 @@ ZEND_API ZEND_COLD void ZEND_FASTCALL zend_argument_value_error(uint32_t arg_num
 #define Z_PARAM_OBJECT(dest) \
 	Z_PARAM_OBJECT_EX(dest, 0, 0)
 
+#define Z_PARAM_OBJECT_OR_NULL(dest) \
+	Z_PARAM_OBJECT_EX(dest, 1, 0)
+
 /* old "O" */
 #define Z_PARAM_OBJECT_OF_CLASS_EX2(dest, _ce, check_null, deref, separate) \
 		Z_PARAM_PROLOGUE(deref, separate); \
@@ -1534,6 +1553,9 @@ ZEND_API ZEND_COLD void ZEND_FASTCALL zend_argument_value_error(uint32_t arg_num
 #define Z_PARAM_OBJECT_OF_CLASS(dest, _ce) \
 	Z_PARAM_OBJECT_OF_CLASS_EX(dest, _ce, 0, 0)
 
+#define Z_PARAM_OBJECT_OF_CLASS_OR_NULL(dest, _ce) \
+	Z_PARAM_OBJECT_OF_CLASS_EX(dest, _ce, 1, 0)
+
 /* old "p" */
 #define Z_PARAM_PATH_EX2(dest, dest_len, check_null, deref, separate) \
 		Z_PARAM_PROLOGUE(deref, separate); \
@@ -1673,6 +1695,7 @@ ZEND_API ZEND_COLD void ZEND_FASTCALL zend_argument_value_error(uint32_t arg_num
 
 #define Z_PARAM_STR_OR_LONG_OR_NULL(dest_str, dest_long, is_null) \
 	Z_PARAM_STR_OR_LONG_EX(dest_str, dest_long, is_null, 1);
+
 /* End of new parameter parsing API */
 
 /* Inlined implementations shared by new and old parameter parsing APIs */
@@ -1931,6 +1954,25 @@ static zend_always_inline int zend_parse_arg_str_or_long(zval *arg, zend_string
 	return 1;
 }
 
+static zend_always_inline int zend_parse_arg_class_name_or_obj(
+	zval *arg, zend_class_entry **destination, int num, int allow_null
+) {
+	if (EXPECTED(Z_TYPE_P(arg) == IS_STRING)) {
+		*destination = zend_lookup_class(Z_STR_P(arg));
+
+		return *destination != NULL;
+	} else if (EXPECTED(Z_TYPE_P(arg) == IS_OBJECT)) {
+		*destination = Z_OBJ_P(arg)->ce;
+	} else if (allow_null && EXPECTED(Z_TYPE_P(arg) == IS_NULL)) {
+		*destination = NULL;
+	} else {
+		*destination = NULL;
+		return 0;
+	}
+
+	return 1;
+}
+
 END_EXTERN_C()
 
 #endif /* ZEND_API_H */
diff --git a/Zend/zend_builtin_functions.c b/Zend/zend_builtin_functions.c
index 521c2c32de19..881624d321a8 100644
--- a/Zend/zend_builtin_functions.c
+++ b/Zend/zend_builtin_functions.c
@@ -637,26 +637,15 @@ ZEND_FUNCTION(get_called_class)
    Retrieves the parent class name for object or class or current scope or false if not in a scope. */
 ZEND_FUNCTION(get_parent_class)
 {
-	zval *arg;
 	zend_class_entry *ce = NULL;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|z", &arg) == FAILURE) {
-		RETURN_THROWS();
-	}
+	ZEND_PARSE_PARAMETERS_START(0, 1)
+		Z_PARAM_OPTIONAL
+		Z_PARAM_CLASS_NAME_OR_OBJ(ce)
+	ZEND_PARSE_PARAMETERS_END();
 
-	if (!ZEND_NUM_ARGS()) {
+	if (!ce) {
 		ce = zend_get_executed_scope();
-		if (ce && ce->parent) {
-			RETURN_STR_COPY(ce->parent->name);
-		} else {
-			RETURN_FALSE;
-		}
-	}
-
-	if (Z_TYPE_P(arg) == IS_OBJECT) {
-		ce = Z_OBJ_P(arg)->ce;
-	} else if (Z_TYPE_P(arg) == IS_STRING) {
-		ce = zend_lookup_class(Z_STR_P(arg));
 	}
 
 	if (ce && ce->parent) {
diff --git a/Zend/zend_builtin_functions.stub.php b/Zend/zend_builtin_functions.stub.php
index 9e5078f14a9c..a79aced5fed7 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): string {}
 
 function get_called_class(): string {}
 
-function get_parent_class($object = UNKNOWN): string|false {}
+function get_parent_class(string|object $object = UNKNOWN): string|false {}
 
 function is_subclass_of($object, string $class_name, bool $allow_string = true): bool {}
 
diff --git a/Zend/zend_builtin_functions_arginfo.h b/Zend/zend_builtin_functions_arginfo.h
index df1f06888ee9..c464a540a1ff 100644
--- a/Zend/zend_builtin_functions_arginfo.h
+++ b/Zend/zend_builtin_functions_arginfo.h
@@ -54,7 +54,7 @@ ZEND_END_ARG_INFO()
 #define arginfo_get_called_class arginfo_zend_version
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(arginfo_get_parent_class, 0, 0, MAY_BE_STRING|MAY_BE_FALSE)
-	ZEND_ARG_INFO(0, object)
+	ZEND_ARG_TYPE_MASK(0, object, MAY_BE_STRING|MAY_BE_OBJECT, NULL)
 ZEND_END_ARG_INFO()
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_is_subclass_of, 0, 2, _IS_BOOL, 0)
diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 0b4520566fe0..6813b60e624c 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -2295,7 +2295,7 @@ PHP_FUNCTION(date_create)
 	ZEND_PARSE_PARAMETERS_START(0, 2)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_STRING(time_str, time_str_len)
-		Z_PARAM_OBJECT_OF_CLASS_EX(timezone_object, date_ce_timezone, 1, 0)
+		Z_PARAM_OBJECT_OF_CLASS_OR_NULL(timezone_object, date_ce_timezone)
 	ZEND_PARSE_PARAMETERS_END();
 
 	php_date_instantiate(date_ce_date, return_value);
@@ -2318,7 +2318,7 @@ PHP_FUNCTION(date_create_immutable)
 	ZEND_PARSE_PARAMETERS_START(0, 2)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_STRING(time_str, time_str_len)
-		Z_PARAM_OBJECT_OF_CLASS_EX(timezone_object, date_ce_timezone, 1, 0)
+		Z_PARAM_OBJECT_OF_CLASS_OR_NULL(timezone_object, date_ce_timezone)
 	ZEND_PARSE_PARAMETERS_END();
 
 	php_date_instantiate(date_ce_immutable, return_value);
@@ -2342,7 +2342,7 @@ PHP_FUNCTION(date_create_from_format)
 		Z_PARAM_STRING(format_str, format_str_len)
 		Z_PARAM_STRING(time_str, time_str_len)
 		Z_PARAM_OPTIONAL
-		Z_PARAM_OBJECT_OF_CLASS_EX(timezone_object, date_ce_timezone, 1, 0)
+		Z_PARAM_OBJECT_OF_CLASS_OR_NULL(timezone_object, date_ce_timezone)
 	ZEND_PARSE_PARAMETERS_END();
 
 	php_date_instantiate(date_ce_date, return_value);
@@ -2366,7 +2366,7 @@ PHP_FUNCTION(date_create_immutable_from_format)
 		Z_PARAM_STRING(format_str, format_str_len)
 		Z_PARAM_STRING(time_str, time_str_len)
 		Z_PARAM_OPTIONAL
-		Z_PARAM_OBJECT_OF_CLASS_EX(timezone_object, date_ce_timezone, 1, 0)
+		Z_PARAM_OBJECT_OF_CLASS_OR_NULL(timezone_object, date_ce_timezone)
 	ZEND_PARSE_PARAMETERS_END();
 
 	php_date_instantiate(date_ce_immutable, return_value);
@@ -2390,7 +2390,7 @@ PHP_METHOD(DateTime, __construct)
 	ZEND_PARSE_PARAMETERS_START(0, 2)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_STRING(time_str, time_str_len)
-		Z_PARAM_OBJECT_OF_CLASS_EX(timezone_object, date_ce_timezone, 1, 0)
+		Z_PARAM_OBJECT_OF_CLASS_OR_NULL(timezone_object, date_ce_timezone)
 	ZEND_PARSE_PARAMETERS_END();
 
 	zend_replace_error_handling(EH_THROW, NULL, &error_handling);
@@ -2412,7 +2412,7 @@ PHP_METHOD(DateTimeImmutable, __construct)
 	ZEND_PARSE_PARAMETERS_START(0, 2)
 		Z_PARAM_OPTIONAL
 		Z_PARAM_STRING(time_str, time_str_len)
-		Z_PARAM_OBJECT_OF_CLASS_EX(timezone_object, date_ce_timezone, 1, 0)
+		Z_PARAM_OBJECT_OF_CLASS_OR_NULL(timezone_object, date_ce_timezone)
 	ZEND_PARSE_PARAMETERS_END();
 
 	zend_replace_error_handling(EH_THROW, NULL, &error_handling);
diff --git a/ext/standard/tests/class_object/get_parent_class_variation_002.phpt b/ext/standard/tests/class_object/get_parent_class_variation_002.phpt
index 8d3e64e92515..a8c8e1711760 100644
--- a/ext/standard/tests/class_object/get_parent_class_variation_002.phpt
+++ b/ext/standard/tests/class_object/get_parent_class_variation_002.phpt
@@ -70,10 +70,14 @@ $values = array(
 
 // loop through each element of the array for object
 
-foreach($values as $value) {
-      echo "\nArg value " . (is_object($value) ? get_class($value) : $value) . " \n";
-      var_dump( get_parent_class($value) );
-};
+foreach ($values as $value) {
+    echo "\nArg value " . (is_object($value) ? get_class($value) : $value) . "\n";
+    try {
+        var_dump(get_parent_class($value));
+    } catch (TypeError $exception) {
+        echo $exception->getMessage() . "\n";
+    }
+}
 
 echo "Done";
 ?>
@@ -82,91 +86,91 @@ echo "Done";
 Error: 2 - Undefined variable $undefined_var
 Error: 2 - Undefined variable $unset_var
 
-Arg value 0 
-bool(false)
+Arg value 0
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, int given
 
-Arg value 1 
-bool(false)
+Arg value 1
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, int given
 
-Arg value 12345 
-bool(false)
+Arg value 12345
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, int given
 
-Arg value -2345 
-bool(false)
+Arg value -2345
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, int given
 
-Arg value 10.5 
-bool(false)
+Arg value 10.5
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, float given
 
-Arg value -10.5 
-bool(false)
+Arg value -10.5
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, float given
 
-Arg value 101234567000 
-bool(false)
+Arg value 101234567000
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, float given
 
-Arg value 1.07654321E-9 
-bool(false)
+Arg value 1.07654321E-9
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, float given
 
-Arg value 0.5 
-bool(false)
+Arg value 0.5
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, float given
 Error: 2 - Array to string conversion
 
-Arg value Array 
-bool(false)
+Arg value Array
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, array given
 Error: 2 - Array to string conversion
 
-Arg value Array 
-bool(false)
+Arg value Array
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, array given
 Error: 2 - Array to string conversion
 
-Arg value Array 
-bool(false)
+Arg value Array
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, array given
 Error: 2 - Array to string conversion
 
-Arg value Array 
-bool(false)
+Arg value Array
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, array given
 Error: 2 - Array to string conversion
 
-Arg value Array 
-bool(false)
+Arg value Array
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, array given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, null given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, null given
 
-Arg value 1 
-bool(false)
+Arg value 1
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, bool given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, bool given
 
-Arg value 1 
-bool(false)
+Arg value 1
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, bool given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, bool given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
 
-Arg value string 
+Arg value string
 In autoload(string)
-bool(false)
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
 
-Arg value String 
+Arg value String
 In autoload(String)
-bool(false)
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, string given
 
-Arg value stdClass 
+Arg value stdClass
 bool(false)
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, null given
 
-Arg value  
-bool(false)
+Arg value 
+get_parent_class(): Argument #1 ($object) must be a valid class name or object, null given
 Done