Upgrading

Author: Girgias

UPGRADING

@@ -19,6 +19,16 @@ PHP 8.4 UPGRADE NOTES
 1. Backward Incompatible Changes
 ========================================
 
+- Core:
+  . isset() and empty() now check that the offset for string values is of the
+    correct type i.e. numeric, similarly to array and objects.
+    This means code similar to:
+    $a = 'string';
+    var_dump(isset($a['b']));
+    var_dump(empty($a['b']));
+    will now warn with: "Cannot access offset of type string on string"
+    when previously it silently returned false.
+
 - DOM:
   . New methods and constants were added to some DOM classes. If you inherit
     from these and you happen to have a method or property with the same name,