Fix a few Iterator signatures

Author: kocsismate

ext/spl/spl_iterators.c

@@ -684,13 +684,17 @@ PHP_METHOD(RecursiveIteratorIterator, getDepth)
 PHP_METHOD(RecursiveIteratorIterator, getSubIterator)
 {
 	spl_recursive_it_object   *object = Z_SPLRECURSIVE_IT_P(ZEND_THIS);
-	zend_long  level = object->level;
+	zend_long level;
+	zend_bool level_is_null = 1;
 	zval *value;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l", &level) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l!", &level, &level_is_null) == FAILURE) {
 		RETURN_THROWS();
 	}
-	if (level < 0 || level > object->level) {
+
+	if (level_is_null) {
+		level = object->level;
+	} else if (level < 0 || level > object->level) {
 		RETURN_NULL();
 	}
 

ext/spl/spl_iterators.stub.php

@@ -74,7 +74,7 @@ public function next() {}
     public function getDepth() {}
 
     /** @return RecursiveIterator|null */
-    public function getSubIterator(int $level = UNKNOWN) {}
+    public function getSubIterator(?int $level = null) {}
 
     /** @return RecursiveIterator */
     public function getInnerIterator() {}

ext/spl/spl_iterators_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 38fb46070ea48e774343e59de53797969acf4b06 */
+ * Stub hash: 3ae3f106e4691ec7958bed54164b5960c36d88e4 */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_EmptyIterator_current, 0, 0, 0)
 ZEND_END_ARG_INFO()
@@ -51,7 +51,7 @@ ZEND_END_ARG_INFO()
 #define arginfo_class_RecursiveIteratorIterator_getDepth arginfo_class_EmptyIterator_current
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_RecursiveIteratorIterator_getSubIterator, 0, 0, 0)
-	ZEND_ARG_TYPE_INFO(0, level, IS_LONG, 0)
+	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, level, IS_LONG, 1, "null")
 ZEND_END_ARG_INFO()
 
 #define arginfo_class_RecursiveIteratorIterator_getInnerIterator arginfo_class_EmptyIterator_current