related to #1693 changed smarty version to 4.1.0

include/smarty/docs/programmers/api-functions/api-register-cacheresource.md

@@ -0,0 +1,40 @@
+registerCacheResource()
+
+dynamically register CacheResources
+
+Description
+===========
+
+void
+
+registerCacheResource
+
+string
+
+name
+
+Smarty\_CacheResource
+
+resource\_handler
+
+Use this to dynamically register a [CacheResource
+plugin](#caching.custom) with Smarty. Pass in the `name` of the
+CacheResource and the object extending Smarty\_CacheResource. See
+[Custom Cache Implementation](#caching.custom) for more information on
+how to create custom CacheResources.
+
+> **Note**
+>
+> In Smarty2 this used to be a callback function called
+> `$cache_handler_func`. Smarty3 replaced this callback by the
+> `Smarty_CacheResource` module.
+
+
+    <?php
+    $smarty->registerCacheResource('mysql', new Smarty_CacheResource_Mysql());
+    ?>
+
+       
+
+See also [`unregisterCacheResource()`](#api.unregister.cacheresource)
+and the [Custom CacheResource Implementation](#caching.custom) section.