我试图利用wp_schedule_single_event 计划异步任务。然而，我的事件在60秒后从未被调用。我需要做些什么吗ldp_new_topic_event 在这里使用之前要先钩住它？我的网站正在共享主机上运行。

以下是我如何编码我的时间表：

<?php

if ( !class_exists( \'LDP_Notifications\' ) ) :

final class LDP_Notifications {

   public static function new_topic_notification( $topic_id = 0, $forum_id = 0, $anonymous_data = false, $author_id = 0, $is_edit = false) {

       // Do some stuff.
       // Based on some conditions the following is called:
       error_log(\'++++ schedule an event. I see this printed.\');

       add_action( \'ldp_new_topic_event\', \'LDP_Notifications::send_push_notification\', 10, 2 );
       wp_schedule_single_event( time() + 90, \'ldp_new_topic_event\', array( $message, $deviceTokens ) );
   }

   public static function send_push_notification( $message, $deviceTokens )  
   {
        error_log(\'Expecting this after 60 seconds but I never got it.\');
   }
}

endif;

?>