diff options
Diffstat (limited to 'modules/system/system.api.php')
| -rw-r--r-- | modules/system/system.api.php | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/modules/system/system.api.php b/modules/system/system.api.php index 79ac8f169..fbb0a554f 100644 --- a/modules/system/system.api.php +++ b/modules/system/system.api.php @@ -689,7 +689,8 @@ function hook_element_info_alter(&$type) { * Perform cleanup tasks. * * This hook is run at the end of each page request. It is often used for - * page logging and specialized cleanup. This hook MUST NOT print anything. + * page logging and specialized cleanup. This hook MUST NOT print anything + * because by the time it runs the response is already sent to the browser. * * Only use this hook if your code must run even for cached page views. * If you have code which must run once on all non-cached pages, use |