File: /www/wwwroot/softfox.com.cn/wp-content/plugins/wpjam-basic/extends/wpjam-seo.php
<?php
/*
Name: 简单 SEO
URI: https://mp.weixin.qq.com/s/LzGWzKCEl5SdJCQdBvFipg
Description: 简单 SEO 扩展实现最简单快捷的方式设置 WordPress 站点的 SEO。
Version: 2.0
*/
class WPJAM_SEO extends WPJAM_Option_Model{
public static function sanitize_callback($value){
flush_rewrite_rules();
return $value;
}
public static function get_fields(){
if(file_exists(ABSPATH.'robots.txt')){
$robots_field = ['type'=>'view', 'value'=>'博客的根目录下已经有 robots.txt 文件。<br />请直接编辑或者删除之后在后台自定义。'];
}else{
$robots_field = ['type'=>'textarea', 'class'=>'', 'rows'=>10, 'value'=>self::get_default_robots()];
}
if(file_exists(ABSPATH.'sitemap.xml')){
$wpjam_sitemap = '博客的根目录下已经有 sitemap.xml 文件。<br />删除之后才能使用插件自动生成的 sitemap.xml。';
}else{
$wpjam_sitemap = '<table>
<tr><td style="padding:0 10px 8px 0;">首页/分类/标签：</td><td style="padding:0 10px 8px 0;"><a href="'.home_url('/sitemap.xml').'" target="_blank">'.home_url('/sitemap.xml').'</a></td></tr>
<tr><td style="padding:0 10px 8px 0;">前1000篇文章：</td><td style="padding:0 10px 8px 0;"><a href="'.home_url('/sitemap-1.xml').'" target="_blank">'.home_url('/sitemap-1.xml').'</a></td></tr>
<tr><td style="padding:0 10px 8px 0;">1000-2000篇文章：</td><td style="padding:0 10px 8px 0;"><a href="'.home_url('/sitemap-2.xml').'" target="_blank">'.home_url('/sitemap-2.xml').'</a></td></tr>
<tr><td style="padding:0 10px 8px 0;" colspan=2>以此类推...</a></td></tr>
</table>';
}
$wp_sitemap = '<a href="'.home_url('/wp-sitemap.xml').'" target="_blank">'.home_url('/wp-sitemap.xml').'</a>';
$auto_view = '<p>文章摘要作为页面的 Meta Description，文章的标签作为页面的 Meta Keywords。<br />分类和标签的描述作为页面的 Meta Description，页面没有 Meta Keywords。</p>';
$unique = '如果当前主题或其他插件也会生成摘要和关键字，可以通过勾选该选项移除。<br />如果当前主题没有<code>wp_head</code>Hook，也可以通过勾选该选项确保生成摘要和关键字。';
$seo_fields = [
'post_set' => ['title'=>'文章和分类页', 'type'=>'fieldset', 'fields'=>[
'individual' => ['type'=>'select', 'options'=>[0=>'自动获取摘要和关键字',1=>'单独设置 SEO TDK']],
'auto' => ['type'=>'view', 'show_if'=>['key'=>'individual', 'value'=>'0'], 'value'=>$auto_view],
'list_table' => ['type'=>'select', 'show_if'=>['key'=>'individual', 'value'=>'1'], 'value'=>1, 'options'=>['1'=>'编辑和列表页都可设置','0'=>'仅可在编辑页设置','only'=>'仅可在列表页设置']]
]],
'unique' => ['title'=>'确保唯一设置', 'type'=>'checkbox', 'description'=>$unique],
'robots' => ['title'=>'robots.txt']+$robots_field,
'sitemap' => ['title'=>'Sitemap', 'type'=>'fieldset', 'fields'=>[
'sitemap' => ['type'=>'select', 'options'=>[0=>'使用 WPJAM 生成的', 'wp'=>'使用 WordPress 内置的']],
'wpjam' => ['type'=>'view', 'value'=>$wpjam_sitemap, 'show_if'=>['key'=>'sitemap', 'value'=>0]],
'wp' => ['type'=>'view', 'value'=>$wp_sitemap, 'show_if'=>['key'=>'sitemap', 'value'=>'wp']]
]]
];
$home_fields = [
'home_title' => ['title'=>'SEO 标题', 'type'=>'text', 'placeholder'=>'不填则使用标题'],
'home_description' => ['title'=>'SEO 描述', 'type'=>'textarea', 'class'=>''],
'home_keywords' => ['title'=>'SEO 关键字', 'type'=>'text' ],
];
if(is_admin()){
if(isset($GLOBALS['current_tab'])){
return $GLOBALS['current_tab'] == 'seo' ? $seo_fields : $home_fields;
}
}
return $seo_fields + $home_fields;
}
public static function get_menu_page(){
return [[
'tab_slug' => 'seo',
'plugin_page' => 'wpjam-seo',
'title' => 'SEO设置',
'order' => 20,
'function' => 'option',
'summary' => __FILE__,
], [
'tab_slug' => 'home',
'plugin_page' => 'wpjam-seo',
'title' => '首页设置',
'order' => 20,
'function' => 'option',
]];
}
public static function get_admin_load(){
if(self::get_setting('individual')){
return [
'base' => ['post','edit', 'edit-tags', 'term'],
'model' => self::class
];
}
}
public static function get_default_robots(){
$site_url = parse_url( site_url() );
$path = !empty($site_url['path']) ? $site_url['path'] : '';
return "User-agent: *
Disallow: /wp-admin/
Disallow: /wp-includes/
Disallow: /cgi-bin/
Disallow: $path/wp-content/plugins/
Disallow: $path/wp-content/themes/
Disallow: $path/wp-content/cache/
Disallow: $path/author/
Disallow: $path/trackback/
Disallow: $path/feed/
Disallow: $path/comments/
Disallow: $path/search/";
}
public static function sitemap($action){
$sitemap = '';
if(!$action){
$last_mod = str_replace(' ', 'T', get_lastpostmodified('GMT')).'+00:00';
$sitemap .= "\t<url>\n";
$sitemap .="\t\t<loc>".home_url()."</loc>\n";
$sitemap .="\t\t<lastmod>".$last_mod."</lastmod>\n";
$sitemap .="\t\t<changefreq>daily</changefreq>\n";
$sitemap .="\t\t<priority>1.0</priority>\n";
$sitemap .="\t</url>\n";
$taxonomies = [];
foreach (get_taxonomies(['public' => true]) as $taxonomy => $value) {
if($taxonomy != 'post_format'){
$taxonomies[] = $taxonomy;
}
}
$terms = get_terms(['taxonomy'=>$taxonomies]);
foreach ($terms as $term) {
$priority = ($term->taxonomy == 'category')?0.6:0.4;
$sitemap .="\t<url>\n";
$sitemap .="\t\t<loc>".get_term_link($term)."</loc>\n";
$sitemap .="\t\t<lastmod>".$last_mod."</lastmod>\n";
$sitemap .="\t\t<changefreq>daily</changefreq>\n";
$sitemap .="\t\t<priority>".$priority."</priority>\n";
$sitemap .="\t</url>\n";
}
}elseif(is_numeric($action)){
$post_types = [];
foreach (get_post_types(['public' => true]) as $post_type => $value) {
if($post_type != 'page' && $post_type != 'attachment'){
$post_types[] = $post_type;
}
}
$sitemap_posts = WPJAM_Query([
'posts_per_page' => 1000,
'paged' => $action,
'post_type' => $post_types,
])->posts;
if($sitemap_posts){
foreach ($sitemap_posts as $sitemap_post) {
$permalink = get_permalink($sitemap_post->ID); //$siteurl.$sitemap_post->post_name.'/';
$last_mod = str_replace(' ', 'T', $sitemap_post->post_modified_gmt).'+00:00';
$sitemap .="\t<url>\n";
$sitemap .="\t\t<loc>".$permalink."</loc>\n";
$sitemap .="\t\t<lastmod>".$last_mod."</lastmod>\n";
$sitemap .="\t\t<changefreq>weekly</changefreq>\n";
$sitemap .="\t\t<priority>0.8</priority>\n";
$sitemap .="\t</url>\n";
}
}
}else{
$sitemap = apply_filters('wpjam_'.$action.'_sitemap', '');
}
header ("Content-Type:text/xml");
$renderer = new WP_Sitemaps_Renderer();
echo '<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="'.$renderer->get_sitemap_stylesheet_url().'"?>
<!-- generated-on="'.date('d. F Y').'" -->
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'."\n".$sitemap."\n".'</urlset>'."\n";
exit;
}
public static function get_meta_fields(){
return [
'seo_title' => ['title'=>'SEO标题', 'type'=>'text', 'class'=>'large-text', 'placeholder'=>'不填则使用标题'],
'seo_description' => ['title'=>'SEO描述', 'type'=>'textarea'],
'seo_keywords' => ['title'=>'SEO关键字','type'=>'text', 'class'=>'large-text']
];
}
public static function get_meta_value($type='title'){
if(is_front_page()){
if(get_query_var('paged') < 2 && !wpjam_is_module()){
$meta_value = self::get_setting('home_'.$type);
}
}elseif(is_tag() || is_category() || is_tax()){
if(get_query_var('paged') < 2){
if(self::get_setting('individual')){
$meta_value = get_term_meta(get_queried_object_id(), 'seo_'.$type, true);
}
if(empty($meta_value) && $type == 'description'){
$meta_value = term_description();
}
}
}elseif(is_singular()){
if(self::get_setting('individual')){
$meta_value = get_post_meta(get_the_ID(), 'seo_'.$type, true);
}
if(empty($meta_value)){
if($type == 'description'){
$meta_value = get_the_excerpt();
}elseif($type == 'keywords'){
$tags = get_the_tags();
$meta_value = $tags ? implode(',', wp_list_pluck($tags, 'name')) : '';
}
}
}
if(!empty($meta_value)){
$meta_value = wpjam_get_plain_text($meta_value);
if($type == 'title'){
return esc_textarea($meta_value);
}else{
return esc_attr($meta_value);
}
}
return '';
}
public static function filter_document_title($title){
return self::get_meta_value('title') ?: $title;
}
public static function filter_post_json($post_json, $post_id){
return array_merge($post_json, [
'meta_description' => self::get_meta_value('description'),
'meta_keywords' => self::get_meta_value('keywords'),
]);
}
public static function filter_posts_json($posts_json){
return array_merge($posts_json, [
'meta_description' => self::get_meta_value('description'),
'meta_keywords' => self::get_meta_value('keywords'),
]);
}
public static function filter_robots_txt($output, $public){
return '0' == $public ? "Disallow: /\n" : self::get_setting('robots');
}
public static function filter_html($html){
$meta_title = self::get_meta_value('title');
$meta_values = [];
foreach(['description', 'keywords'] as $type){
$meta_value = self::get_meta_value($type);
if($meta_value){
$meta_values[$type] = "<meta name='{$type}' content='{$meta_value}' />";
}
}
if($meta_values){
$html = preg_replace('#<meta\s{1,}name=[\'"]('.implode('|', array_keys($meta_values)).')[\'"]\s{1,}content=[\'"].*?[\'"]\s{1,}\/>#is', '', $html);
}
if($meta_title || $meta_values){
$meta_title = $meta_title ?: '\1';
$meta_values = $meta_values ? "\n\n".implode("\n", $meta_values)."\n\n" : '';
return preg_replace('#<title>(.*?)<\/title>#is', '<title>'.$meta_title.'</title>'.$meta_values, $html);
}
return $html;
}
public static function on_wp_head(){
remove_action('wp_head', '_wp_render_title_tag', 1);
$meta_title = self::get_meta_value('title');
if($meta_title){
echo '<title>'.$meta_title.'</title>'."\n";
}else{
_wp_render_title_tag();
}
foreach(['description', 'keywords'] as $type){
$meta_value = self::get_meta_value($type);
if($meta_value){
echo "<meta name='{$type}' content='{$meta_value}' />\n";
}
}
}
public static function builtin_page_load($screen){
if(in_array($screen->base, ['edit', 'post'])
&& $screen->post_type != 'attachment'
&& is_post_type_viewable($screen->post_type)
){
wpjam_register_post_option('seo', [
'title' => 'SEO设置',
'page_title' => 'SEO设置',
'context' => 'side',
'list_table' => self::get_setting('list_table', 1),
'fields' => [self::class,'get_meta_fields']
]);
}elseif(in_array($screen->base, ['edit-tags', 'term'])
&& is_taxonomy_viewable($screen->taxonomy)
){
wpjam_register_term_option('seo', [
'title' => 'SEO设置',
'page_title' => 'SEO设置',
'action' => 'edit',
'submit_text' => '设置',
'list_table' => self::get_setting('list_table', 1),
'fields' => [self::class, 'get_meta_fields']
]);
}
}
public static function init(){
if(self::get_setting('sitemap') == 0){
add_rewrite_rule($GLOBALS['wp_rewrite']->root.'sitemap\.xml?$', 'index.php?module=sitemap', 'top');
add_rewrite_rule($GLOBALS['wp_rewrite']->root.'sitemap-(.*?)\.xml?$', 'index.php?module=sitemap&action=$matches[1]', 'top');
wpjam_register_route('sitemap', ['callback'=>[self::class, 'sitemap']]);
}
}
public static function add_hooks(){
if(self::get_setting('unique')){
add_filter('wpjam_html', [self::class, 'filter_html']);
}else{
add_action('wp_head', [self::class, 'on_wp_head'], 0);
}
add_filter('robots_txt', [self::class, 'filter_robots_txt'], 10, 2);
add_filter('document_title', [self::class, 'filter_document_title']);
add_filter('wpjam_post_json', [self::class, 'filter_post_json'], 10, 2);
add_filter('wpjam_posts_json', [self::class, 'filter_posts_json']);
}
}
wpjam_register_option('wpjam-seo', ['model'=>'WPJAM_SEO', 'title'=>'SEO设置',]);