[ci skip] Add affected_rows() to db reference docs
diff --git a/user_guide_src/source/database/db_driver_reference.rst b/user_guide_src/source/database/db_driver_reference.rst
index 1ecd389..aaca908 100644
--- a/user_guide_src/source/database/db_driver_reference.rst
+++ b/user_guide_src/source/database/db_driver_reference.rst
@@ -116,6 +116,15 @@
for use when you don't need to get a result object or to
just send a query to the database and not care for the result.
+ .. php:method:: affected_rows()
+ :returns: Number of rows affected
+ :rtype: int
+
+ Returns the number of rows *changed* by the last executed query.
+
+ Useful for checking how much rows were created, updated or deleted
+ during the last executed query.
+
.. php:method:: trans_strict([$mode = TRUE])
:param bool $mode: Strict mode flag