I'm using this script in two places on the same page to output some RSS feeds:

    include_once(ABSPATH . WPINC . '/feed.php');
    $rss = fetch_feed('https://api.twitter.com/1/statuses/user_timeline.rss?screen_name=BarackObama');
    $maxitems = $rss->get_item_quantity(3);
    $rss_items = $rss->get_items(0, $maxitems);
<?php if ($maxitems == 0) echo '<p class="alert">No activity to display.</p>'; ?>
    if (!$maxitems == 0)
    foreach ( $rss_items as $item ) : ?>
            <a href="<?php echo $item->get_permalink(); ?>">
                <?php echo $item->get_title(); ?>
                <time datetime="<?php echo $item->get_local_date('%Y-%m-%d %H:%M'); ?>" class="timestamp">
                    <?php echo $item->get_local_date('%A %d %b %H:%M'); ?>
    <?php endforeach; ?>

I'm manually setting the cache lifetime in my functions.php to two hours:

function filter_handler( $seconds ) {
    return 7200;
add_filter( 'wp_feed_cache_transient_lifetime', 'filter_handler' );

A few times a day, the feed breaks and displays this error instead:

Fatal error: Call to undefined method WP_Error::get_item_quantity() in /public_html/wp-content/themes/twentyeleven/home-page.php on line 100

It seems WordPress' fetch of this Twitter feed occasionally fails, then the error is output for 2 hours until the cache is flushed.

How can I get around this?


This happens, because Twitter stopped the API v1. To get around WP_Error in your code:

// functions.php
function fetch_twitter()
    $rss = fetch_feed('https://api.twitter.com/1/statuses/user_timeline.rss?screen_name=BarackObama');

    if ( is_wp_error( $rss ) )

    // continue in your function
    $maxitems = $rss->get_item_quantity(3);

// template

Won’t help much in your case. Switch to the new API.

  • Difficult to test since the problem is intermittent. It's been happening for a while now, be surprised if Twitter's API is that flakey. Thanks for the code to handle the error, have included that. – AlecRust Jun 6 '13 at 21:26
  • Unfortunately this still blocks the rest of the page from rendering when there's an error. Any way to prevent this? – AlecRust Jun 13 '13 at 0:16
  • Wrap it in a function. I will make an update. – fuxia Jun 13 '13 at 7:00
  • Thanks. Am I correct in assuming this won't work with API v1.1, since https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=BarackObama returns an error due to not being authenticated via OAuth? – AlecRust Jun 13 '13 at 17:13
  • @AlecRust Yes, seems so. – fuxia Jun 13 '13 at 17:22

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