Includes shortcode

function digwp_includeContentShortcode($atts) {
 
  $thepostid = intval($atts[postidparam]);
  $output = '';
 
  query_posts("p=$thepostid&post_type=page");
  if (have_posts()) : while (have_posts()) : the_post();
    $output .= get_the_content($post->ID);
  endwhile; else:
    // failed, output nothing
  endif;
  wp_reset_query();
 
  return $output;
 
}
 
// USAGE
// In the post content, you can use [digwp_include postidparam="1234"]
// "1234" would be the WordPress ID of the Page you are trying to include
 
add_shortcode("digwp_include", "digwp_includeContentShortcode");