PHP WP_Query::is_tag方法代码示例

 /**
  * @param WP_Query $wp_query
  *
  * @return WP_Query
  */
 public function action_pre_get_posts(WP_Query $wp_query)
 {
     if (is_admin()) {
         return;
     }
     if (!empty($wp_query->query_vars['suppress_filters'])) {
         return;
     }
     # Further reading:
     # https://core.trac.wordpress.org/ticket/14589
     # https://core.trac.wordpress.org/ticket/19471
     if (!$wp_query->is_main_query()) {
         return;
     }
     if ($wp_query->is_tag()) {
         $taxomony = 'post_tag';
     } else {
         if ($wp_query->is_category()) {
             $taxomony = 'category';
         } else {
             return;
         }
     }
     $post_type = $wp_query->get('post_type');
     if (empty($post_type)) {
         $post_type = $this->post_type_support_taxomony($taxomony);
     }
     $wp_query->set('post_type', $post_type);
     return $wp_query;
 }

 /**
  * Get the fork's parent post, set up a query, and load correct template.
  *
  * Duplicates the functionality of /wp-includes/template-loader.php and includes
  * a lot of copypasta, but that's only to ensure that it follows the same logic.
  *
  */
 function choose_template()
 {
     $p = get_queried_object_id();
     if (get_post_type($p) !== 'fork') {
         return;
     }
     $pp = get_post($p)->post_parent;
     $parent = get_post($pp);
     if ($parent->post_type == 'page') {
         $query = array('page_id' => $pp);
     } else {
         $query = array('p' => $pp);
     }
     $t = new WP_Query($query);
     $template = false;
     if ($t->is_404() && ($template = get_404_template())) {
     } elseif ($t->is_search() && ($template = get_search_template())) {
     } elseif ($t->is_tax() && ($template = get_taxonomy_template())) {
     } elseif ($t->is_front_page() && ($template = get_front_page_template())) {
     } elseif ($t->is_home() && ($template = get_home_template())) {
     } elseif ($t->is_attachment() && ($template = get_attachment_template())) {
         remove_filter('the_content', 'prepend_attachment');
     } elseif ($t->is_single() && ($template = get_single_template())) {
     } elseif ($t->is_page && ($template = get_page_template())) {
     } elseif ($t->is_category() && ($template = get_category_template())) {
     } elseif ($t->is_tag() && ($template = get_tag_template())) {
     } elseif ($t->is_author() && ($template = get_author_template())) {
     } elseif ($t->is_date() && ($template = get_date_template())) {
     } elseif ($t->is_archive() && ($template = get_archive_template())) {
     } elseif ($t->is_comments_popup() && ($template = get_comments_popup_template())) {
     } elseif ($t->is_paged() && ($template = get_paged_template())) {
     } else {
         $template = get_index_template();
     }
     if ($template = apply_filters('template_include', $template)) {
         include $template;
     }
     return;
 }

 /**
  * @param WP_Query $wp_query
  *
  * @return array()
  */
 private function extract_tax_archive_data($wp_query)
 {
     $taxonomy = false;
     $term_id = false;
     if ($wp_query->is_category()) {
         $taxonomy = 'category';
         $term_id = $wp_query->get('cat');
     } elseif ($wp_query->is_tag()) {
         $taxonomy = 'post_tag';
         $term_id = $wp_query->get('tag_id');
     } elseif ($wp_query->is_tax()) {
         $taxonomy = $wp_query->get('taxonomy');
         $term_id = $wp_query->get_queried_object_id();
     }
     return array($taxonomy, $term_id);
 }

 /**
  * Alternates the 'posts_per_page' query_var on taxonomy archive pages
  *
  * @todo Correct taxonomy value ?
  *
  * @param WP_Query $query
  */
 public function alter_taxonomy_archive($query)
 {
     if (is_admin() || !$query->is_main_query()) {
         return;
     }
     if (!($query->is_tax() || $query->is_category() || $query->is_tag())) {
         return;
     }
     if (is_tax()) {
         // Get query var
         $taxonomy = $query->tax_query->queries[0]['taxonomy'];
         $tax_obj = get_taxonomy($taxonomy);
         $query_var = $tax_obj->query_var;
         if ($query->get($taxonomy)) {
             $term = get_term_by('slug', $query->get($query_var), $taxonomy);
         }
     } elseif (is_category()) {
         $taxonomy = 'category';
         if ($query->get('cat')) {
             $term = get_term($query->get('cat'), 'category');
         } elseif ($query->get('category_name')) {
             $term = get_term_by('slug', $query->get('category_name'), 'category');
         }
     } elseif (is_tag()) {
         $taxonomy = 'post_tag';
         if ($query->get('tag_id')) {
             $term = get_term($query->get('tag_id'), 'post_tag');
         } else {
             $term = get_term_by('slug', $query->get('tag'), 'post_tag');
         }
     }
     if (taxonomy_supports($taxonomy, $this->global_feature)) {
         $posts_per_page = (int) g1_get_theme_option('taxonomy_' . $taxonomy, 'posts_per_page');
         if (-1 === $posts_per_page || $posts_per_page > 0) {
             $query->set('posts_per_page', $posts_per_page);
         }
     }
     if (taxonomy_supports($taxonomy, $this->individual_feature)) {
         if ($term) {
             $term_meta = (array) g1_get_term_meta($term->term_id, '_g1');
             $posts_per_page = isset($term_meta['posts_per_page']) ? (int) $term_meta['posts_per_page'] : 0;
             if (-1 === $posts_per_page || $posts_per_page > 0) {
                 $query->set('posts_per_page', $posts_per_page);
             }
         }
     }
 }

 /**
  * Parse which page we are on using URL
  */
 public function getPageObject($pageUrl)
 {
     global $wp_rewrite;
     // If post type, we are using url_to_postid function
     $postId = url_to_postid($pageUrl);
     if ($postId) {
         $postType = get_post_type_object(get_post($postId)->post_type);
         return array('value' => $postId, 'title' => get_the_title($postId), 'type' => get_post($postId)->post_type, 'label' => is_array($postType->labels) ? $postType->labels['name'] : $postType->labels->name);
     }
     $path = str_replace(get_site_url(), '', $pageUrl);
     $path = trim($path, '/');
     // If path is empty, then it is front page
     if (empty($path)) {
         return array('value' => get_option('page_on_front') ? get_option('page_on_front') : '', 'title' => '', 'type' => 'front_page', 'label' => __('Home Page'));
     }
     // Otherwise, we will try to match through rewrite or by query
     $rewrite = $wp_rewrite->wp_rewrite_rules();
     if (is_array($rewrite) && count($rewrite) > 0) {
         foreach ($rewrite as $match => $query) {
             if (preg_match("#^{$match}#", $path, $matches) || preg_match("#^{$match}#", urldecode($path), $matches)) {
                 $query = preg_replace("!^.*\\?!", '', $query);
                 $query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
                 parse_str($query, $query_vars);
                 break;
             }
         }
     } else {
         $query = preg_replace("!^.*\\?!", '', $path);
         parse_str($query, $query_vars);
     }
     // Workaround for fail pagename rewrite match
     if (isset($query_vars['pagename']) && strpos($query_vars['pagename'], '?') !== false) {
         $query = preg_replace("!^.*\\?!", '', $query_vars['pagename']);
         parse_str($query, $query_vars);
     }
     $querypost = new WP_Query($query_vars);
     if ($querypost->is_date()) {
         if ($querypost->query_vars['m']) {
             $date = $querypost->query_vars['m'];
         } else {
             if ($querypost->is_day()) {
                 $date = $querypost->query_vars['year'] . zeroise($querypost->query_vars['monthnum'], 2) . zeroise($querypost->query_vars['day'], 2);
             } else {
                 if ($querypost->is_month()) {
                     $date = $querypost->query_vars['year'] . zeroise($querypost->query_vars['monthnum'], 2);
                 } else {
                     if ($querypost->is_year()) {
                         $date = $querypost->query_vars['year'];
                     }
                 }
             }
         }
         return array('value' => $date, 'title' => '', 'type' => 'archive', 'label' => __("Archive"));
     } else {
         if ($querypost->is_category() || $querypost->is_tag() || $querypost->is_tax()) {
             $tax_query = $querypost->tax_query->queries;
             $taxonomy = get_taxonomy($tax_query[0]['taxonomy']);
             if ($tax_query[0]['field'] == 'term_id') {
                 $term_id = $tax_query[0]['terms'][0];
             } else {
                 if ($tax_query[0]['field'] == 'slug') {
                     $term_id = get_term_by('slug', $tax_query[0]['terms'][0], $taxonomy->name)->term_id;
                 }
             }
             return array('value' => $term_id, 'title' => get_term($term_id, $taxonomy->name)->name, 'type' => $taxonomy->name, 'label' => is_array($taxonomy->labels->name) ? $taxonomy->labels['name'] : $taxonomy->labels->name);
         } else {
             if ($querypost->is_search()) {
                 return array('value' => $querypost->query_vars['s'], 'title' => '', 'type' => 'search', 'label' => __("Search"));
             } else {
                 if ($querypost->is_home()) {
                     return array('value' => '', 'title' => '', 'type' => 'home', 'label' => __("Blog Home Page"));
                 }
             }
         }
     }
 }

 /**
  * Removes or adds products CPT in search
  * @param WP_Query $query
  */
 public function pre_get_posts($query)
 {
     if ($query->is_main_query()) {
         global $etp_blog_grid;
         if ($query->is_search && !empty($_GET['post_type'])) {
             $post_types = $_GET['post_type'];
             $query->set('post_type', $post_types);
         }
         $post_archive = $query->is_category() || $query->is_tag() || $query->is_home();
         if ($post_archive) {
             $etp_blog_grid = explode(',', $this->get('blog-grid', '1,10'));
             $per_page = array_product($etp_blog_grid);
             if ($this->get('blog-layout', 'left-image') && $per_page) {
                 $query->set('posts_per_page', $per_page);
             }
         }
     }
 }

 /**
  * The rule of this ordering is: from the most specific to the least.
  * Most of the default WP Template Hierarchy is the same, but not all is followed.
  *
  * For the full example of our lookup order plesase follow to:
  *
  * For the default WP hierarchy follow to:
  * http://codex.wordpress.org/Template_Hierarchy
  *
  * @param WP_Query $wp_query
  * @return array
  */
 protected function defineLookupOrder(\WP_Query $wp_query)
 {
     $result = [];
     if (!$wp_query) {
         return $result;
     }
     // prepare vars
     $post = !empty($wp_query->posts) ? $wp_query->posts[0] : false;
     $post_type = $post ? $post->post_type : false;
     $post_slug = $post ? $post->post_name : false;
     $query_post_type = $wp_query->query_vars['post_type'];
     if (is_array($query_post_type)) {
         // it's not usual to have multiple post types on a rewrite rule
         // but even if there is, it's extremely inconsistent to rely on
         // a template name with multiple post types
         // if that's the case, the user will have to alter the template
         // order manually
         $query_post_type = false;
     }
     // start the template hierarchy build up
     if ($wp_query->is_404()) {
         // 404-[post-type]
         // 404
         if ($query_post_type) {
             $result[] = '404-' . $query_post_type;
         }
         $result[] = '404';
     } elseif ($wp_query->is_search()) {
         // search
         // archive
         $result[] = 'search';
         $result[] = 'archive';
     } elseif ($wp_query->is_front_page()) {
         // if is page on front:
         // front-page
         // page
         // singular
         // if is posts on front:
         // front-page
         // home
         // archive-[post-type]
         // [post-type]
         // archive
         $result[] = 'front-page';
         if ($post_type) {
             if ($post_type !== 'page') {
                 $result[] = 'home';
                 $result[] = 'archive-' . $post_type;
                 $result[] = $post_type;
                 $result[] = 'archive';
             } else {
                 $result[] = 'page';
                 $result[] = 'singular';
             }
         }
     } elseif ($wp_query->is_home()) {
         // home
         // archive-[post-type]
         // [post-type]
         // archive
         $result[] = 'home';
         if ($post_type) {
             $result[] = 'archive-' . $post_type;
             $result[] = $post_type;
             $result[] = 'archive';
         }
         // for now this is not needed, test more
         // } elseif ($wp_query->is_post_type_archive()) {
         //     $result[] = 'archive-'.$query_post_type;
         //     $result[] = $query_post_type;
         //     $result[] = 'archive';
     } elseif ($wp_query->is_author()) {
         // author-[user-login]
         // author-[user-nicename]
         // author
         // archive
         if ($author = get_userdata($post->post_author)) {
             $result[] = 'author-' . $author->data->user_login;
             if ($author->data->user_login !== $author->data->user_nicename) {
                 $result[] = 'author-' . $author->data->user_nicename;
             }
         }
         $result[] = 'author';
         $result[] = 'archive';
     } elseif ($wp_query->is_tax() || $wp_query->is_tag() || $wp_query->is_category()) {
         // taxonomy-[taxonomy]-[term-slug]
         // taxonomy-[taxonomy]
         // taxonomy-[post-type]
//.........这里部分代码省略.........

function alter_the_query($request)
{
    $dummy_query = new WP_Query();
    // the query isn't run if we don't pass any query vars
    $dummy_query->parse_query($request);
    // this is the actual manipulation; do whatever you need here
    if ($dummy_query->is_tag()) {
        $request['post_type'] = array('post', 'product');
    }
    return $request;
}