How to use pre_schedule_event filter in WordPress

Are you diving into the world of WordPress hooks and stumbled upon the pre_schedule_event filter? This little gem can be a bit tricky but incredibly useful when you want to intercept and modify scheduled events. Let me walk you through how it works and how you can use it in your WordPress projects.

The pre_schedule_event filter allows you to return a non-null value, which will bypass adding the event to the cron array and instead return the filtered value. To utilize this filter, you need to register it with add_filter. You can do this in your theme’s functions.php or, to avoid issues when updating your theme, in a custom WordPress plugin.

WePlugins always recommends creating a custom plugin for hooks to ensure your customizations are safe during updates. Now, let’s look at some practical examples of how to use this filter.

Example 1: Modifying Pre Schedule Event Defaults

Here’s a simple example of defining and using a function to modify the default behavior of the pre_schedule_event.

    function weplugins_modify_pre_schedule_event_defaults($pre, $event, $wp_error) {
        // Update the $pre variable according to your website requirements.
        return $pre;
    }
    // Add the filter
    add_filter("pre_schedule_event", "weplugins_modify_pre_schedule_event_defaults", 10, 3);
    

Example 2: Removing the Hook Callback

Sometimes, you need to remove a registered hook. Here’s how you can do that for the pre_schedule_event filter.

    remove_filter("pre_schedule_event", "weplugins_modify_pre_schedule_event_defaults", 10, 3);
    

Ensure you provide the same callback function name, priority, and number of arguments when removing the hook callback.

Example 3: Applying the Filter

Below is an example of how to apply this hook with the necessary parameters.

    apply_filters('pre_schedule_event', null|bool|WP_Error $pre, stdClass $event, bool $wp_error);
    

Contact Us

If you’re having any trouble using this hook, or need customization, please feel free to reach out to us. Contact our WordPress Development Team and we’d be happy to assist you.