WordPress：主机中的wp-includes/canonical.php未定义索引的问题

问：

刚刚重新启动了我的服务器，现在出现了五个错误，所有错误都与wp-include文件夹中的规范.php有关：

[Sun Sep 22 19:55:37.037647 2019] [php7:notice] PHP Notice:  Undefined index: host in /www/webroot/cafed/wordpress/wp-includes/canonical.php on line 507
[Sun Sep 22 19:55:37.037679 2019] [php7:notice] PHP Notice:  Undefined index: host in /www/webroot/cafed/wordpress/wp-includes/canonical.php on line 508
[Sun Sep 22 19:55:37.037702 2019] [php7:notice] PHP Notice:  Undefined index: host in /www/webroot/cafed/wordpress/wp-includes/canonical.php on line 508
[Sun Sep 22 19:55:37.037708 2019] [php7:notice] PHP Notice:  Undefined index: host in /www/webroot/cafed/wordpress/wp-includes/canonical.php on line 509
[Sun Sep 22 19:55:37.037714 2019] [php7:notice] PHP Notice:  Undefined index: host in /www/webroot/cafed/wordpress/wp-includes/canonical.php on line 512

这似乎与这段代码有关：

// Ignore differences in host capitalization, as this can lead to infinite redirects
// Only redirect no-www <=> yes-www
if ( strtolower( $original['host'] ) == strtolower( $redirect['host'] ) ||
    ( strtolower( $original['host'] ) != 'www.' . strtolower( $redirect['host'] ) && 'www.' . strtolower( $original['host'] ) != strtolower( $redirect['host'] ) ) ) {
    $redirect['host'] = $original['host'];
}

$compare_original = array( $original['host'], $original['path'] );

似乎与非 www 与 www 域有关。

知道如何纠正这个问题吗？