主题优化处理

wordpress最为全球最流行的博客或者CMS程序，他有他国外的特色，在国内很多东西也是不那么实用的，我们这里需要对functions.php进行添加一些代码来帮助和优化WordPress，提高国内的访问速度！

//添加代码
//屏蔽Gutenberg 编辑器
add_filter('use_block_editor_for_post', '__return_false');
remove_action( 'wp_enqueue_scripts', 'wp_common_block_scripts_and_styles' );

//去掉w.s.org表情调用
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_action( 'admin_print_styles', 'print_emoji_styles' );

//屏蔽头部加载 s.w.org
add_filter( 'emoji_svg_url', '__return_false' );

// 移除头部冗余代码
remove_action( 'wp_head', 'wp_generator' );// WP版本信息
remove_action( 'wp_head', 'rsd_link' );// 离线编辑器接口
remove_action( 'wp_head', 'wlwmanifest_link' );// 同上
remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );// 上下文章的url
remove_action( 'wp_head', 'feed_links', 2 );// 文章和评论feed
remove_action( 'wp_head', 'feed_links_extra', 3 );// 去除评论feed
remove_action( 'wp_head', 'wp_shortlink_wp_head', 10, 0 );// 短链接
remove_action( 'wp_head', 'rest_output_link_wp_head', 10 );
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );
remove_action( 'wp_head', 'index_rel_link' );
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 );
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 );
remove_action( 'wp_head', 'wp_generator' );

//移除WordPress头部加载DNS预获取（dns-prefetch）
function remove_dns_prefetch( $hints, $relation_type ) {
if ( 'dns-prefetch' === $relation_type ) {
return array_diff( wp_dependencies_unique_hosts(), $hints );
}
return $hints;
}
add_filter( 'wp_resource_hints', 'remove_dns_prefetch', 10, 2 );

//移除CSS或JS的版本号后的一长串内容
if(!function_exists('cwp_remove_script_version')){
function cwp_remove_script_version( $src ){ return remove_query_arg( 'ver', $src ); }
add_filter( 'script_loader_src', 'cwp_remove_script_version' );
add_filter( 'style_loader_src', 'cwp_remove_script_version' );
}

//admin bar左侧的wordpress logo和链接等
add_action( 'admin_bar_menu', 'cwp_remove_wp_logo_from_admin_bar_new', 25 );
function cwp_remove_wp_logo_from_admin_bar_new( $wp_admin_bar ) {
$wp_admin_bar->remove_node( 'wp-logo' );
}

//移除WP为仪表盘(dashboard)页面加载的小工具
function cwp_remove_dashboard_widgets() {
global $wp_meta_boxes;
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts']);
unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
}

//禁用 XML-RPC 接口
add_filter('xmlrpc_enabled', '__return_false');

//关闭 XML-RPC 的 pingback 端口
add_filter( 'xmlrpc_methods', 'remove_xmlrpc_pingback_ping' );
function remove_xmlrpc_pingback_ping( $methods ) {
unset( $methods['pingback.ping'] );
return $methods;
}

//删除pingback
add_filter('wp_headers', 'remove_pingback');
function remove_pingback( $headers )
{
unset($headers['X-Pingback']);
return $headers;
}

//移除REST API和wp-json
add_filter('rest_enabled', '_return_false');
add_filter('rest_jsonp_enabled', '_return_false');
remove_action( 'wp_head', 'rest_output_link_wp_head', 10 );
remove_action( 'wp_head', 'wp_oembed_add_discovery_links', 10 );

//自动TAG转内链
$match_num_from = 1; // 一个TAG标签出现几次才加链接
$match_num_to = 1; // 同一个标签加几次链接
add_filter('the_content','tag_link',1);
function tag_sort($a, $b){
if ( $a->name == $b->name ) return 0;
return ( strlen($a->name) > strlen($b->name) ) ? -1 : 1;
}
function tag_link($content){
global $match_num_from,$match_num_to;
$posttags = get_the_tags();
if ($posttags) {
usort($posttags, "tag_sort");
foreach($posttags as $tag) {
$link = get_tag_link($tag->term_id);
$keyword = $tag->name;
$cleankeyword = stripslashes($keyword);
$url = "".addcslashes($cleankeyword, '$')."";
$limit = rand($match_num_from,$match_num_to);
$content = preg_replace( '|(<a[^>]+>)(.*)('.$ex_word.')(.*)(</a[^>]*>)|U'.$case, '$1$2%&&&&&%$4$5', $content);
$content = preg_replace( '|(<img)(.*?)('.$ex_word.')(.*?)(>)|U'.$case, '$1$2%&&&&&%$4$5', $content);
$cleankeyword = preg_quote($cleankeyword,'\'');
$regEx = '\'(?!((<.*?)|(<a.*?)))('. $cleankeyword . ')(?!(([^<>]*?)>)|([^>]*?))\'s' . $case;
$content = preg_replace($regEx,$url,$content,$limit);
$content = str_replace( '%&&&&&%', stripslashes($ex_word), $content);
}
}
return $content;
}