无需按钮即可添加：

register_activation_hook( __FILE__, \'my_plugin_install_function\');

function my_plugin_install_function()
  {
   //post status and options
    $post = array(
          \'comment_status\' => \'closed\',
          \'ping_status\' =>  \'closed\' ,
          \'post_author\' => 1,
          \'post_date\' => date(\'Y-m-d H:i:s\'),
          \'post_name\' => \'Checklists\',
          \'post_status\' => \'publish\' ,
          \'post_title\' => \'Checklists\',
          \'post_type\' => \'page\',
    );  
    //insert page and save the id
    $newvalue = wp_insert_post( $post, false );
    //save the id in the database
    update_option( \'hclpage\', $newvalue );
  }