[ci skip] Update UPGRADING.INTERNALS

Author: nielsdos

UPGRADING.INTERNALS

@@ -121,21 +121,23 @@ PHP 8.3 INTERNALS UPGRADE NOTES
      properties in a read-only way. This function avoids allocation when there are
      no document properties changed yet.
    - The node list returned by DOMNode::getElementsByTagName() and
-	 DOMNode::getElementsByTagNameNS() now caches the length and the last requested item.
-	 This means that the length and the last requested item are not recalculated
-	 when the node list is iterated over multiple times.
-	 If you do not use the internal PHP dom APIs to modify the document, you need to
-	 manually invalidate the cache using php_libxml_invalidate_node_list_cache_from_doc().
-	 Furthermore, the following internal APIs were added to handle the cache:
-	   . php_dom_is_cache_tag_stale_from_doc_ptr()
-	   . php_dom_is_cache_tag_stale_from_node()
-	   . php_dom_mark_cache_tag_up_to_date_from_node()
+	   DOMNode::getElementsByTagNameNS() now caches the length and the last requested item.
+	   This means that the length and the last requested item are not recalculated
+	   when the node list is iterated over multiple times.
+	   If you do not use the internal PHP dom APIs to modify the document, you need to
+	   manually invalidate the cache using php_libxml_invalidate_node_list_cache_from_doc().
+	   Furthermore, the following internal APIs were added to handle the cache:
+	     . php_dom_is_cache_tag_stale_from_doc_ptr()
+	     . php_dom_is_cache_tag_stale_from_node()
+	     . php_dom_mark_cache_tag_up_to_date_from_node()
    - The function dom_get_elements_by_tag_name_ns_raw() has an additional parameter to indicate
      the base node of the node list. This function also no longer accepts -1 as the index argument.
    - The function dom_namednode_iter() has additional arguments to avoid recomputing the length of
      the strings.
    - The functions dom_parent_node_prepend(), dom_parent_node_append(), dom_parent_node_after(), and
      dom_parent_node_before() now use an uint32_t argument for the number of nodes instead of int.
+   - There is now a helper function php_dom_get_content_into_zval() to get the contents of a node.
+     This avoids allocation if possible.
 
  g. ext/libxml
    - Two new functions: php_libxml_invalidate_node_list_cache_from_doc() and