删除对编辑器的帖子类型支持：

add_action(
  \'init\',
  function() {
    remove_post_type_support( \'post\', \'editor\');
  }
);

// print a new meta box
function generic_cb($post) {
  $content = (!empty($post->post_content)) ? $post->post_content : \'\';
  echo \'<textarea name="content">\'.$content.\'</textarea>\';
}

function add_before_editor($post) {
  global $post;
  add_meta_box(
    \'generic_box\', // id, used as the html id att
    __( \'Text Only Content\' ), // meta box title
    \'generic_cb\', // callback function, spits out the content
    \'post\', // post type or page. This adds to posts only
    \'pre_editor\', // context, where on the screen
    \'high\' // priority, where should this go in the context
  );
  do_meta_boxes(\'post\', \'pre_editor\', $post);
}
add_action(\'edit_form_after_title\',\'add_before_editor\');

// strip your data on save
function strip_post_content_markup($data) {
  if (!empty($data[\'post_content\'])) {
    $data[\'post_content\'] = strip_tags($data[\'post_content\']);
  }
  return $data;
}
add_filter(\'wp_insert_post_data\',\'strip_post_content_markup\',1);