I developed a plugin having a custom metabox that is using the save_post hook to store data. The plugin is 18 months old and is used by thousands of customers, so I'm pretty sure everything is good.

Since I updated my testing platform to v3.6.1, I can't get that hook to run on previously created pages/posts. It only works on new ones.

(I am the only WP user in the website. WP DEBUG is enabled)

Has anyone experienced the same? Any clue? I missed some changes?


The code I'm using now to check the hook is this (I've deleted the inner code for privacy reasons):

function saving_metabox($post_id) {

    if(isset($_POST['plugin_noncename'])) {
               ... ...

    return $post_id;
add_action('save_post', 'saving_metabox');
  • 4
    Please add the save_post hook code that you're using (ie, the function you're trying to run) to your question.
    – Pat J
    Sep 18, 2013 at 19:55
  • Sure, I've edited the main post!
    – a-coder
    Sep 19, 2013 at 8:38
  • Being an action, there's no need of return, only if you want to break further execution. Does that die() has any effect? If you disable all other plugins, does the issue persist?
    – brasofilo
    Sep 21, 2013 at 1:27
  • All the plugins in my testing website have been made by me (except WPML) so I'm quite sure there is nothing wrong. Anyway I tried deactivating everything and removing the "return" but nothing changes. This is becoming really really stange..
    – a-coder
    Sep 23, 2013 at 9:55
  • I can assure that on WP 3.6.1 save_post hook is still triggered. So if you have disabled any other plugin and tested on twentythirteen theme, the wrong code is in your plugin. Try to enable logging (not only debug) and read the log, maybe you'll find some info there.
    – gmazzap
    Oct 11, 2013 at 1:18

1 Answer 1


Try changing your content and saving again. This will trigger the action. save_post is only called if the content has changed.

To come in before this is checked, you can use the pre_post_update hook.

add_action( 'pre_post_update', 'saving_metabox' );
function saving_metabox( $post_id ) {
  • Nope, doesn't work.
    – a-coder
    Oct 11, 2013 at 11:51

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