WordPress免插件去除分类链接中Category目录

使用WordPress的人都知道,默认情况下,WordPress分类的永久链接带有category,很明显前缀“category”字样是多余的,一不美观,二不专业,最大的问题是不利于SEO。为了SEO我们常常需要对wordpress做一定优化,今天先给大家分享一个,免插件去掉category的方法,降低目录的深度。方法如下:

// 去除wordpress链接中的category
if( !function_exists('no_category_base_refresh_rules') ){

  register_activation_hook(__FILE__, 'no_category_base_refresh_rules');
  add_action('created_category', 'no_category_base_refresh_rules');
  add_action('edited_category', 'no_category_base_refresh_rules');
  add_action('delete_category', 'no_category_base_refresh_rules');
  function no_category_base_refresh_rules() {
      global $wp_rewrite;
      $wp_rewrite -> flush_rules();
  }

  register_deactivation_hook(__FILE__, 'no_category_base_deactivate');
  function no_category_base_deactivate() {
      remove_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
      // We don't want to insert our custom rules again
      no_category_base_refresh_rules();
  }

  // Remove category base
  add_action('init', 'no_category_base_permastruct');
  function no_category_base_permastruct() {
      global $wp_rewrite, $wp_version;
      if (version_compare($wp_version, '3.4', '<')) {
          // For pre-3.4 support
          $wp_rewrite -> extra_permastructs['category'][0] = '%category%';
      } else {
          $wp_rewrite -> extra_permastructs['category']['struct'] = '%category%';
      }
  }

  // Add our custom category rewrite rules
  add_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
  function no_category_base_rewrite_rules($category_rewrite) {
      //var_dump($category_rewrite); // For Debugging

      $category_rewrite = array();
      $categories = get_categories(array('hide_empty' => false));
      foreach ($categories as $category) {
          $category_nicename = $category -> slug;
          if ($category -> parent == $category -> cat_ID)// recursive recursion
              $category -> parent = 0;
          elseif ($category -> parent != 0)
              $category_nicename = get_category_parents($category -> parent, false, '/', true) . $category_nicename;
          $category_rewrite['(' . $category_nicename . ')/(?:feed/)?(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?category_name=$matches[1]&feed=$matches[2]';
          $category_rewrite['(' . $category_nicename . ')/page/?([0-9]{1,})/?$'] = 'index.php?category_name=$matches[1]&paged=$matches[2]';
          $category_rewrite['(' . $category_nicename . ')/?$'] = 'index.php?category_name=$matches[1]';
      }
      // Redirect support from Old Category Base
      global $wp_rewrite;
      $old_category_base = get_option('category_base') ? get_option('category_base') : 'category';
      $old_category_base = trim($old_category_base, '/');
      $category_rewrite[$old_category_base . '/(.*)$'] = 'index.php?category_redirect=$matches[1]';

      //var_dump($category_rewrite); // For Debugging
      return $category_rewrite;
  }

  // For Debugging
  //add_filter('rewrite_rules_array', 'no_category_base_rewrite_rules_array');
  //function no_category_base_rewrite_rules_array($category_rewrite) {
  //  var_dump($category_rewrite); // For Debugging
  //}

  // Add 'category_redirect' query variable
  add_filter('query_vars', 'no_category_base_query_vars');
  function no_category_base_query_vars($public_query_vars) {
      $public_query_vars[] = 'category_redirect';
      return $public_query_vars;
  }

  // Redirect if 'category_redirect' is set
  add_filter('request', 'no_category_base_request');
  function no_category_base_request($query_vars) {
      //print_r($query_vars); // For Debugging
      if (isset($query_vars['category_redirect'])) {
          $catlink = trailingslashit(get_option('home')) . user_trailingslashit($query_vars['category_redirect'], 'category');
          status_header(301);
          header("Location: $catlink");
          exit();
      }
      return $query_vars;
  }
}

复制以上代码加入到function.php文件中即可。

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