diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/atomlib.php
--- a/wp/wp-includes/atomlib.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/atomlib.php	Wed Sep 21 18:19:35 2022 +0200
@@ -191,7 +191,8 @@
 
     function start_element($parser, $name, $attrs) {
 
-        $tag = array_pop(explode(":", $name));
+        $name_parts = explode(":", $name);
+        $tag        = array_pop($name_parts);
 
         switch($name) {
             case $this->NS . ':feed':
@@ -270,7 +271,8 @@
 
     function end_element($parser, $name) {
 
-        $tag = array_pop(explode(":", $name));
+        $name_parts = explode(":", $name);
+        $tag        = array_pop($name_parts);
 
         $ccount = count($this->in_content);