这是一项有问题的任务。

我建议您运行一个一次性任务：

获取所有标记为“business consultants”的帖子运行一个一次性任务，将帖子的一个数组保存在php文件中，当请求在其中一个url上完成时，重定向到新的站点url，删除帖子，我将把所有代码作为插件编写。

I very strongly suggest you to take a full backup of your database before installing this plugin

页面完全加载之前需要同样的秒数，但之后，如果您进入帖子列表页面，您应该会看到所有标记为“business consultants”的帖子从WordPress中删除，此外，在上载文件夹中，您应该会看到一个名为redirect_deleted_business-consultants.php.

如果有，只需访问如下urlhttp://www.example.com/a-post-slug （其中“a-post-slug”是贴有ost标签的“业务顾问”的真正slug），您应该被重定向到http://www.example.com/business-consultants/a-post-slug.

请注意，如果您删除redirect_deleted_business-consultants.php 文件或卸载插件redirect will not work anymore.将插件安装为must-use plugin 可以是一个防止不停车的想法。

伟大的事情是，你可以移动到自己的WP安装任何其他标签！

E、 g.如果您有一个带有slug“business stuff”的标签，并且您想将其移动到另一个WP安装，只需在url上创建此安装http://www.example.com/business-stuff 并在$target_tags 阵列（见下文）。

代码：

<?php
/**
 * Plugin Name: RedirectDeletedTag
 * Plugin URI: https://wordpress.stackexchange.com/questions/136018/
 */

class RedirectDeletedTag {

  /**
  * Adjust this variable according to real tag slug.
  * The key is the tag slug, and the value is the base url for the redirect.
  * If you want, you can add other tag slugs you want ot move to separate sites.
  */
  protected $target_tags = array(
    \'business-consultants\' => \'http://www.example.com/business-consultants/\',
  );

  function cacheUrls() {
    if ( ! is_admin() || ! current_user_can( \'install_plugins\' ) ) return;
    $t = new ArrayIterator( $this->target_tags );
    while( $t->valid() ) {
      $tag = $t->key();
      if ( $this->shouldCache( $tag ) ) $this->cacheTagUrls( $tag );
      $t->next();
    }
  }

  function redirect() {
    if ( is_admin() ) return;
    $url = $this->getUrl();
    if ( ! empty( $url ) ) {
      $t = new ArrayIterator( $this->target_tags );
      while( $t->valid() ) {
       $this->redirectTag( $t->key(), $url, $t->current() );
       $t->next();
     }
    }
  }

  protected function cacheTagUrls ( $tag ) {
    $args = array( \'post_type\' => \'post\', \'nopaging\' => true, \'tag\' => $tag );
    $query = new WP_Query( $args );
    if ( $query->have_posts() ) {
      $slugs = wp_list_pluck( $query->posts, \'post_name\' );
      $id_list =  implode( \',\',  wp_list_pluck( $query->posts, \'ID\') );
      $cache = \'<?php return array("\' . implode(\'","\', $slugs ) . \'");\';
      if ( @file_put_contents( $this->getCachePath( $tag ), $cache ) !== FALSE ) {
        set_transient( __CLASS__ . $tag, \'1\' );
        // cache saved, delete all posts and term
        global $wpdb;
        $wpdb->query( "DELETE FROM $wpdb->posts WHERE ID IN ($id_list)" );
        $term = get_term_by(\'slug\', $tag, \'post_tag\');
        if ( ! empty( $term ) && isset( $term->term_id ) ) {
          wp_delete_term( $term->term_id, \'post_tag\' );
        }
      }
    }
  }

  protected function redirectTag( $tag, $url, $base ) {
    if ( file_exists( $this->getCachePath( $tag ) ) ) {
      $cached = (array) include $this->getCachePath( $tag );
      if ( in_array( $url, $cached ) ) {
        wp_redirect( trailingslashit( $base ) . $url );
        exit();
      }
    }
  }

  protected function shouldCache( $tag = \'\' ) { 
    $should = FALSE;
    if ( is_admin() && current_user_can( \'install_plugins\' ) ) {
      $transient = get_transient( __CLASS__ . $tag );
      $file = file_exists( $this->getCachePath( $tag ) );
      $should = empty($transient) && ! $file;
    }
    return $should;
  }

  protected function getCachePath( $tag = \'\' ) {
    $upload_dir = wp_upload_dir();
    $base = trailingslashit( $upload_dir[\'basedir\'] );
    return  $base . \'redirect_deleted_\' . $tag . \'.php\';
  }

  protected function getUrl() {
    $home_path = trim( parse_url( home_url(), PHP_URL_PATH ), \'/\' );
    $full = trim( str_replace( $home_path, \'\', add_query_arg( array() ) ), \'/\' );
    $stripped = explode( \'?\', $full );
    return trim( $stripped[0], \'/\' );
  }

}

$rd = new RedirectDeletedTag();
add_action( \'shutdown\', array( $rd, \'cacheUrls\' ) );
add_action( \'after_setup_theme\', array( $rd, \'redirect\' ) );

要运行一个一次性任务，我将使用瞬态加上检查当前用户是否是管理员，再加上缓存文件的存在。如果你愿意，看看这个question/answers 了解WordPress中一次性任务的不同方法。