Zend: remove zend_is_countable()

UPGRADING.INTERNALS

@@ -136,6 +136,7 @@ PHP 8.6 INTERNALS UPGRADE NOTES
   . The zend_save_error_handling() function was removed.
   . The zend_parse_parameter() function has been removed, use one fo the
     zend_parse_arg_TYPE() APIs instead.
+  . The zend_is_countable() function was removed.
 
 - Changed:
   . Internal functions that return by reference are now expected to

Zend/zend_API.c

@@ -5233,23 +5233,6 @@ ZEND_API bool zend_is_iterable(const zval *iterable) /* {{{ */
 }
 /* }}} */
 
-ZEND_API bool zend_is_countable(const zval *countable) /* {{{ */
-{
-	switch (Z_TYPE_P(countable)) {
-		case IS_ARRAY:
-			return 1;
-		case IS_OBJECT:
-			if (Z_OBJ_HT_P(countable)->count_elements) {
-				return 1;
-			}
-
-			return zend_class_implements_interface(Z_OBJCE_P(countable), zend_ce_countable);
-		default:
-			return 0;
-	}
-}
-/* }}} */
-
 static zend_result get_default_via_ast(zval *default_value_zval, const char *default_value) {
 	zend_ast *ast;
 	zend_arena *ast_arena;

Zend/zend_API.h

@@ -960,8 +960,6 @@ static zend_always_inline const char *zend_get_object_type_uc(const zend_class_e
 
 ZEND_API bool zend_is_iterable(const zval *iterable);
 
-ZEND_API bool zend_is_countable(const zval *countable);
-
 ZEND_API void zend_convert_internal_arg_info(zend_arg_info *new_arg_info,
 		const zend_internal_arg_info *arg_info, bool is_return_info,
 		bool permanent);

ext/standard/type.c

@@ -13,6 +13,7 @@
 */
 
 #include "php.h"
+#include "zend_interfaces.h"
 
 /* {{{ Returns the type of the variable */
 PHP_FUNCTION(gettype)
@@ -458,6 +459,18 @@ PHP_FUNCTION(is_countable)
 		Z_PARAM_ZVAL(var)
 	ZEND_PARSE_PARAMETERS_END();
 
-	RETURN_BOOL(zend_is_countable(var));
+
+	switch (Z_TYPE_P(var)) {
+		case IS_ARRAY:
+			RETURN_TRUE;
+		case IS_OBJECT:
+			if (Z_OBJ_HT_P(var)->count_elements) {
+				RETURN_TRUE;
+			}
+
+			RETURN_BOOL(zend_class_implements_interface(Z_OBJCE_P(var), zend_ce_countable));
+		default:
+			RETURN_FALSE;
+	}
 }
 /* }}} */