没有，但你可以使用switch_to_blog() 函数切换到某个站点，然后使用常规WordPress函数检查该帖子类型上是否存在任何帖子。

例如

add_action(\'wp_loaded\', \'wpse167721_check_networkwide_events\');

function wpse167721_check_networkwide_events(){
    global $wpdb;
    $original_blog_id = get_current_blog_id(); // get the original blog id

    // get network sites
    $args = array(
        \'network_id\' => $wpdb->siteid,
        \'public\'     => null,
        \'archived\'   => null,
        \'mature\'     => null,
        \'spam\'       => null,
        \'deleted\'    => null,
        \'limit\'      => 100,
        \'offset\'     => 0,
    );
    $sites = wp_get_sites($args);

    foreach($sites as $site){
        // switch to blog
        switch_to_blog($site[\'blog_id\']);

        if(!wpse167721_is_event_exists())
            continue; // skip current iteration and go to the next one

        // Event exists! do whatever you want to do

    }

  // lets switch to our original blog
  switch_to_blog($original_blog_id);

}


function wpse167721_is_event_exists(){
    $args = array(
        \'post_type\' => \'event\', // change the cpt name here
        \'posts_per_page\' => 1,
        \'fields\' => \'ids\'
    );

    return count(get_posts($args));
}

Caution:此代码将在每次页面加载时为网络中的每个博客运行（因为它连接到wp_loaded). 如果您有一个大型网络，那么可以考虑批处理。

代码未测试