我的函数中有以下代码。php，发布时执行脚本：

function save_new_post($post_ID)
{

    $site_root = \'/home/forexmag/public_html/directory2\';
    $post = get_post($post_ID);
    $title = $post->post_title;
    $breaking_news = false;

    $categories = get_the_category($post_ID);
    if (is_array($categories) && !empty($categories))
    {
        foreach ($categories as $cat_det)
        {
            //this is the id for the breaking (bad) news
            if (5668 == $cat_det->cat_ID)
            {
                $breaking_news = true;
                break;
            }
        }
    }

    $exec_code = "/usr/local/bin/php 
            $site_root 
            /crons/cron_notify.php \'$title\' $post_ID 2 " . intval($breaking_news);
    exec(
        $exec_code
    );

}
add_action(\'publish_page\', \'save_new_post\', 10, 1);

当我发布一篇新文章时，我不断遇到以下错误：

Catchable fatal error: Object of class WP_Post could not be converted to string in /home/forexmag/public_html/wp-content/themes/forex_magnates/functions.php on line 712

这条线是我设置$exec_code 然而，正如您所看到的，正如我通过var\\u dump确认的，$title变量is 字符串。

我错过了什么？

function save_new_post($post_ID)
{
    print_r($post_ID);
    die();

WP_Post Object ( [ID] => ...