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wp_schedule_event events don't fire (8 posts)

  1. ashes999
    Posted 5 years ago #

    I wrote a couple of plugins. The first one, on activate, sets up an event to fire tomorrow (the next day) at midnight (plus 1 minute). Here's my code:

    function plugin_activate() {
      wp_schedule_event(strtotime(date('Y-m-d 00:01:00', , strtotime("+1 day"))), 'daily', 'updateUserScores');

    When I call wp_next_scheduled('updateUserScores') (and throw it through the PHP date function), it gives me the right timestamp. But when I visit the site, nothing happens. I don't have any sort of caching installed.

    I've tried removing the +1 day to make it TODAY at midnight (i.e. a timestamp in the past); it still doesn't fire my event. Not sure what's going on ...

  2. Austin Matzko
    Posted 5 years ago #

    Sorry to ask the obvious, but you do have a callback function for the "updateUserScores" action hook, right?

    If you do and the callback is never called, then you should check if WordPress's built-in cron is working at all. Try a couple of other plugins that use the cron functionality, or look at the "cron" option in the wp_options database table to see if scheduled pings are piling up in there and not being discharged.

  3. ashes999
    Posted 5 years ago #

    Yes, I do have the callback function :) I even scheduled a wget every five minutes so I can be sure I have timely "visitors" to trigger my cron event.

    I'm using wp-db-backup, which uses schedule-event, and it triggers fine; can you suggest another plugin?

    wp_options only has my function listed once under the cron option. However, I did see something called doing_cron which is set to 0.

    To clarify, I have a table called wp_logging which I can log messages to (it gives me the timestamp). My code is more like this:

    function activate() {
    function updateScores
      logMessage("Scores updated.")
      logMessage("Next update: " . wp_next_scheduled(...));

    I can see the initial logging message from the first call of updateScores, and it gives me the correct timestamp for wp_next_scheduled; but the updateScores function never fires after that. (The data that should be inserted by updateScores doesn't show up, either.)

  4. Samuel Wood (Otto)
    Tech Ninja
    Posted 5 years ago #

    Are you confusing functions with actions?

    The event you've scheduled will not run a function, it will do an action. So where's your add_action() call, to hook that action to the function?

    Like this:

    function my_activation() {
    wp_schedule_event(whatever, 'daily', 'my_action');
    function my_function() {
  5. ashes999
    Posted 5 years ago #

    Otto42: I suspect you're right. Strange how I missed that one line of code when I skimmed the tutorials.

    It seems to be working now with a past-timestamp; I'm going to go ahead with my original functionality and let you know tomorrow if it works. And I anticipate that it will :)

    Is it possible we can update the documentation for wp_schedule_event to mention that you do NOT pass in a function, but rather, you need to add a hook? It's a bit unclear :/

  6. Samuel Wood (Otto)
    Tech Ninja
    Posted 5 years ago #

    The documentation makes it pretty clear, I thought:

    I mean, it even calls it "my_scheduled_hook" and everything. And here's the main description:

    Schedules a hook which will be executed by the WordPress actions core on a specific interval, specified by you. The action will trigger when someone visits your WordPress site, if the scheduled time has passed. See the Plugin API for a list of hooks.

    Don't see how it could be any clearer.

    Also, make certain that you do the unschedule on deactivation. Otherwise your hook hangs around forever.

    Another thing: Calling the function manually and then scheduling for 1 day in advance seems a bit of a weird thing to do, to me. Instead, you should just schedule it for now() with a daily recurrence. It'll execute then on the very next page load, which they have to do to get to your settings screen anyway.

  7. ashes999
    Posted 5 years ago #

    Maybe it could say "Actions are NOT arbitrary functions. Click [here] to learn about Actions." I didn't even know this notion of actions exists in WP.

    Anyhow, it's resolved--thanks Otto. The reason I activate and schedule is because I need it to run at a specific time (midnight), even if I activate at a different time; but running the code on activate is mostly for debugging. I had my long-term design a bit confused :)

  8. Austin Matzko
    Posted 5 years ago #

    In ashes999 defense, the inline docs do say

    @param callback $hook Function or method to call, when cron is run.

    which is wrong, and oddly is corrected on the Codex version.

    At any rate, I've made a patch.

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