伙计们，我要做的是在执行一系列函数和自定义代码之前，在代码中运行一系列if检查。其中一个if检查将检查帖子是否已经存在，如果已经存在，它将检查帖子的年龄，如果帖子超过48小时，它将删除该帖子并重新创建一个新帖子。

大意是：

global $wpdb;

if ( !is_user_logged_in())
   echo \'You must be logged in.\';

// check if title $my_post_name already exists in wpdb
else if ( is_user_logged_in()&& $wpdb->get_row("SELECT post_title FROM wp_posts WHERE post_title = \'" . $my_post_name . "\'", \'ARRAY_A\')) {

// then check age of the post? assign age to a variable?
  $time = age-of-post?

if $time >= 172800 // in seconds
code:  delete the post and create a new one 
else
$xtime = 172800 - $time;
echo \'You have already challenged\' .$character. \'within the last 48 hours. You can challenge\' .$character.\'again in\' .$xtime.\'.\';

我希望这有点道理。我的问题是，你如何获得帖子的年龄，是否有一个功能可以删除wordpress中已经存在的帖子？或者有没有一种更简单的方法可以让帖子在x个时间段后失效？

global $wpdb;

if ( !is_user_logged_in())
   echo \'You must be logged in.\';

// check if title $my_post_name already exists in wpdb
else if ( is_user_logged_in()&& $wpdb->get_row("SELECT post_title FROM wp_posts WHERE post_title = \'" . $my_post_name . "\'", \'ARRAY_A\')) {

// then check age of the post? assign age to a variable?
  $time = get_the_date();

if ( $time >= 172800 ) // in seconds
    wp_delete_post()
else
$xtime = 172800 - $time;
echo \'You have already challenged\' .$character. \'within the last 48 hours. You can challenge\' .$character.\'again in\' .$xtime.\'.\';

SELECT post_date FROM wp_posts WHERE ...