wp_unschedule_hook()

wp_unschedule_hook() — Unschedules all events attached to the hook. Can be useful for plugins when deactivating to clean up the cron queue. Warning: This function may return boolean false, but may also return a non-boolean value which evaluates to false. For information about casting to booleans see the {

Inputs: $hook (string): Action hook, the execution of which will be unscheduled. $wp_error (bool): Optional. Whether to return a WP_Error on failure. Default false.

Returns int|false|WP_Error: On success an integer indicating number of events unscheduled (0 indicates no events were registered on the hook), false or WP_Error if unscheduling fails.