根据你的例子

\'example.com/wordpress-how-to/how-to-create-a-child-theme-in-wordpress/\'

搜索=wordpress how to
主题=how-to-create-a-child-theme-in-wordpress/

此代码从搜索词中找到的主题中删除所有单词。

有关更多详细信息，请查看save\\u post中的“避免无限循环”

 function modified_slug( $post_id ) {

     // If this is a revision, get real post ID
     if ( $parent_id = wp_is_post_revision( $post_id ) )
         $post_id = $parent_id;

      // Get default category ID from options
      $defaultcat = get_option( \'default_category\' );

      // Check if this post is in default category
      if ( in_category( $defaultcat, $post_id ) ) {
         // unhook this function so it doesn\'t loop infinitely
         remove_action( \'save_post\', \'modified_slug\', 13, 2 );

         $post_url  =   get_permalink( $post_id );

         $filtered  =   array_filter( explode( \'/\', str_replace( home_url(), \'\', $post_url)));
         $search    =   explode(\'-\', array_shift(array_values($filtered)) );
         $subject   =   end($filtered);
         $new_slug      =   trim( str_replace( $search, \'\', $subject ), \'-\' );

         // Update post
         $my_post = array(
             \'ID\'               =>  $post_id,
             \'post_name\'    =>  $new_slug
         );

         // Update the post into the database
         wp_update_post( $my_post );

         // re-hook this function
         add_action( \'save_post\', \'modified_slug\', 13, 2 );
     }
 }
 add_action( \'save_post\', \'modified_slug\', 13, 2 );

1. https://codex.wordpress.org/Plugin_API/Action_Reference/save_post
2. https://codex.wordpress.org/Function_Reference/wp_is_post_revision
3. https://codex.wordpress.org/Function_Reference/wp_update_post