我的WordPress调试。日志中充满了这组七个PHP警告/通知，至少每半小时出现一次。。。

[08-Mar-2018 09:05:03 UTC] PHP Notice:  Trying to get property of non-object in /home/mysite/public_html/wp-includes/class-wp-query.php on line 3736
[08-Mar-2018 09:05:03 UTC] PHP Notice:  Trying to get property of non-object in /home/mysite/public_html/wp-includes/class-wp-query.php on line 3738
[08-Mar-2018 09:05:03 UTC] PHP Notice:  Trying to get property of non-object in /home/mysite/public_html/wp-includes/class-wp-query.php on line 3740
[08-Mar-2018 09:05:03 UTC] PHP Notice:  Trying to get property of non-object in /home/mysite/public_html/wp-includes/class-wp-query.php on line 3736
[08-Mar-2018 09:05:03 UTC] PHP Notice:  Trying to get property of non-object in /home/mysite/public_html/wp-includes/class-wp-query.php on line 3738
[08-Mar-2018 09:05:03 UTC] PHP Notice:  Trying to get property of non-object in /home/mysite/public_html/wp-includes/class-wp-query.php on line 3740
[08-Mar-2018 09:05:03 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/mysite/public_html/wp-includes/class-wp-query.php:3736) in /home/mysite/public_html/wp-includes/pluggable.php on line 1216

问题是，据我所知，没有提到是哪个插件或罪魁祸首导致了这种情况（我认为这个术语是，没有回溯/堆栈跟踪），所以我发现很难调试。

问题是：How can I find out more detail in order to trace the cause?

我已经有了WP_DEBUG, WP_DEBUG 和WP_DEBUG_DISPLAY 全部设置为true。

我已经了解了设置PHPdisplay_errors 和error_reporting 但是，由于我已经收到通知和警告输出，我不确定这些设置是否会添加更多细节。

这些警告是否可能是由非WordPress插件生成的？我有一个在cron上运行的PHP脚本，它调用wpdb环境，但严格来说它不是一个插件。

/* That\'s all, stop editing! Happy blogging. */

set_error_handler(function() {
    error_log(print_r(debug_backtrace(), true));
    return true;
}, E_USER_NOTICE);

define( \'WP_DEBUG\', true );
define( \'WP_DEBUG_LOG\', true );
define( \'WP_DEBUG_DISPLAY\', false );

/* That\'s all, stop editing! Happy blogging. */

set_error_handler(function() {
    $log = "\\r\\n==========\\r\\nSTACK TRACE:";
    foreach ( debug_backtrace() as $i => $item ) {
        if ( 0 === $i ) {
            $log .= "\\r\\n" . $item[\'args\'][1];
        } else {
            $log .= "\\r\\n" . $item[\'file\'] . \' -- line \' . $item[\'line\'];
        }
    }
    $log .= "\\r\\n==========";
    error_log( $log );
    return true;
}, E_USER_NOTICE);

define( \'WP_DEBUG\', true );
define( \'WP_DEBUG_LOG\', true );