有一个函数要获取one post 从…起one blog, 但就是这样：

<?php 
  $post = get_blog_post( $blog_id, $post_id ); 
  echo $post->ID;
?>

$rss = fetch_feed(\'http://feed.url\');
// Figure out how many total items there are, but limit it to 5. 
$maxitems = $rss->get_item_quantity(5); 
// Build an array of all the items, starting with element 0 (first element).
$rss_items = $rss->get_items(0, $maxitems);

foreach ( $rss_items as $item ) { // Loop
    echo $item->get_title();
    echo $item->get_content();
}