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-rw-r--r--modules/system/system.api.php4
1 files changed, 3 insertions, 1 deletions
diff --git a/modules/system/system.api.php b/modules/system/system.api.php
index 8f72133d9..fea9a9746 100644
--- a/modules/system/system.api.php
+++ b/modules/system/system.api.php
@@ -888,7 +888,9 @@ function hook_page_build(&$page) {
* - "delivery callback": The function to call to package the result of the
* page callback function and send it to the browser. Defaults to
* drupal_deliver_html_page() unless a value is inherited from a parent menu
- * item.
+ * item. Note that this function is called even if the access checks fail,
+ * so any custom delivery callback function should take that into account.
+ * See drupal_deliver_html_page() for an example.
* - "access callback": A function returning a boolean value that determines
* whether the user has access rights to this menu item. Defaults to
* user_access() unless a value is inherited from a parent menu item.