一个分享IT教程经验的站点，涉及windows和linux操作系统下的常用技术和软件使用的内容分享，包含shell编程、python编程、web架构搭建、开源框架、编程工具的使用、数据安全、运维经验分享等内容。
使用Google XML Sitemaps生成全站地图后，访问https://www.guojingyi.cn/sitemap.xml异常：
原因：
wordpress下的functions.php文件，结构如：
<?php>
function
<?>
functions与标签<?php>或<?>之间包含空行
解决办法：
删除首尾空行即可！
如果你使用wordpress，并且使用了wordpress某些安全插件，在安全插件的检测中，如果提示：Your site does not have a default theme！
则，很有可能是你把wordpress的默认主题（二〇二〇、二〇一九、Twenty Seventeen、Twenty Sixteen）都删除了！
解决办法是任选其中一个安装上,但并不启用，这样操作的实际意义是：
One of the twenty* themes. For 5.x, that’s twentynineteen. You should have a default theme so if yours gets borked, you can delete it. WP will fall back to the default, then you can do what you need to do to fix things.
做完上面操作以后，安全检测插件可能还会提示，存在未使用的主题，为了安全建议删除未使用的主题！个人感觉两个安全策略虽然都是为了安全，但是存在矛盾点的，建议只保留一个未使用的默认主题！
编辑wp-config.php并将WP_DEFAULT_THEME常量定义添加到文件中。
例如，要使WordPress经典主题classic设置为默认主题，则将下面代码添加到wp-config.php中：
define（'WP_DEFAULT_THEME'，'classic'）;
官方参考链接：https://codex.wordpress.org/Network_Admin_Themes_Screen#Default_Theme
function travelify_footer_info()
{
echo '<div class="copyright">' . __('Copyright ©', 'travelify') . ' ' . date('Y') . ' ' . travelify_site_link() . '. </div>';
}
function travelify_footer_rightinfo()
{
echo '<div class="footer-right">';
echo "";
echo '</div>';
}function add_after_post_content($content)
{
if (!is_feed() && !is_home() && is_singular() && is_main_query()) {
$content .= "<div class=\"bdsharebuttonbox\"><a href=\"#\" class=\"bds_weixin\" data-cmd=\"weixin\" title=\"分享到微信\"></a><a href=\"#\" class=\"bds_tsina\" data-cmd=\"tsina\" title=\"分享到新浪微博\"></a><a href=\"#\" class=\"bds_qzone\" data-cmd=\"qzone\" title=\"分享到QQ空间\"></a><a href=\"#\" class=\"bds_renren\" data-cmd=\"renren\" title=\"分享到人人网\"></a></div>" . "<script>window._bd_share_config={\"common\":{\"bdSnsKey\":{},\"bdText\":\"\",\"bdMini\":\"2\",\"bdMiniList\":false,\"bdPic\":\"\",\"bdStyle\":\"1\",\"bdSize\":\"24\"},\"share\":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script>";
}
return $content;
}
add_filter('the_content', 'add_after_post_content');function my_custom_disable_author_page()
{
global $wp_query;
if (is_author()) {
$wp_query->set_404();
status_header(404);
// Redirect to homepage
// wp_redirect(get_option('home'));
}
}
add_action('template_redirect', 'my_custom_disable_author_page');function filter_get_comment_author_url($url, $id, $commentr)
{
return "";
}
add_filter('get_comment_author_url', 'filter_get_comment_author_url', 10, 3);function disable_feed()
{
// wp_die(__('No feed available, please visit the <a href="' . esc_url(home_url('/')) . '">homepage</a>!'));
wp_redirect(home_url(), 301);
}
add_action('do_feed', 'disable_feed', 1);
add_action('do_feed_rdf', 'disable_feed', 1);
add_action('do_feed_rss', 'disable_feed', 1);
add_action('do_feed_rss2', 'disable_feed', 1);
add_action('do_feed_atom', 'disable_feed', 1);
add_action('do_feed_rss2_comments', 'disable_feed', 1);
add_action('do_feed_atom_comments', 'disable_feed', 1);
remove_action('wp_head', 'feed_links_extra', 3);
remove_action('wp_head', 'feed_links', 2);function chinese_sanitize_user($username, $raw_username, $strict)
{
$username = wp_strip_all_tags($raw_username);
$username = remove_accents($username);$username = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '', $username);
$username = preg_replace('/&.+?;/', '', $username);
if ($strict) {
$username = preg_replace('|[^a-z\p{Han}0-9 _.\-@]|iu', '', $username);
}
$username = trim($username);$username = preg_replace('|\s+|', ' ', $username);
return $username;
}
add_filter('sanitize_user', 'chinese_sanitize_user', 10, 3);function travelify_posted_on()
{
$time_string = '<time class="entry-date published updated" datetime="%1$s">%2$s</time>';
if (get_the_time('U') !== get_the_modified_time('U')) {
$time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time><time class="updated" datetime="%3$s">%4$s</time>';
}
$time_string = sprintf(
$time_string,
esc_attr(get_the_date('c')),
esc_html(get_the_date()),
esc_attr(get_the_modified_date('c')),
esc_html(get_the_modified_date())
);
$byline = sprintf(
'<span class="author vcard">' . esc_html(get_the_author()) . '</span>'
);
echo '<span class="byline"> ' . $byline . '</span><span class="posted-on">' . '<a href="' . esc_url(get_permalink()) . '" rel="bookmark">' . $time_string . '</a>' . '</span>';
}remove_action('wp_head', 'wp_generator');function utf8Substr($str, $from, $len)
{
return preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,' . $from . '}' .
'((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,' . $len . '}).*#s',
'$1', $str);
}
function meta_SEO()
{
global $post;
$output = '';
if (is_single()) { //如果是文章页
$keywords = '';
$description = '';
if ($post->post_excerpt) { //如果文章摘要存在就以文章摘要为描述
$description = $post->post_excerpt;
$description = str_replace("\r\n", "", $description);
$description = str_replace("\n", "", $description);
$description = str_replace("\"", "'", $description);
$description .= '...';
} else { //如果文章摘要不存在就截断文章前200字为描述
$description = utf8Substr(strip_tags($post->post_content), 0, 200);
$description = str_replace("\r\n", "", $description);
$description = str_replace("\n", "", $description);
$description = str_replace("\"", "'", $description);
$description .= '...';
}
$tags = wp_get_post_tags($post->ID); //取文章标签
foreach ($tags as $tag) {
$keywordarray[] = $tag->name;
}
// 以文章标签为关键字
$keywords = implode(',', array_unique((array) $keywordarray));
} else if (is_page()) {
$keywords = get_the_title($post->post_page);
$description = utf8Substr(strip_tags($post->post_content), 0, 200);
} else if (is_category()) {
$keywords = single_cat_title('', false);
$description = single_cat_title('', false);
} else if (is_tag()) {
$keywords = single_tag_title('', false);
$description = single_tag_title('', false);
} else { //如果不是文章页、分类页
$keywords = 'IT技术,linux,windows,编程语言'; //在引号间写入你博客的关键字用,断开
$description = '一个分享IT教程经验的站点，涉及windows和linux操作系统下的常用技术和软件使用的内容分享，包含shell编程、python编程、web架构搭建、开源框架、编程工具的使用、数据安全、运维经验分享等内容。'; //在引号间写入你博客的简单描述，不要过200字
}
//输出关键字
$output .= '<meta name="keywords" content="' . $keywords . '" />' . "\n";
$output .= '<meta name="description" content="' . $description . '" />' . "\n";
//输出描述
echo "$output";
}
add_action('wp_head', 'meta_SEO');function autoblank($text)
{
$return = str_replace('<a', '<a target="_blank"', $text);
return $return;
}
add_filter('the_content', 'autoblank');function html_page_permalink()
{
global $wp_rewrite;
if (!strpos($wp_rewrite->get_page_permastruct(), '.html')) {
$wp_rewrite->page_structure = $wp_rewrite->page_structure . '.html';
}
}
add_action('init', 'html_page_permalink', -1);