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I've got a very basic solution using fetch_feed() and SimplePie to pull in RSS items which is working on my localhost, but for some reason is_wp_error() persists as true on the live server. Is there anyway for me to get specific output about the nature of the error so as to work towards a solution on the live server?

<?php
  include_once(ABSPATH . WPINC . '/feed.php');
  $rss = fetch_feed( '[rss feed removed from example]' );
  if (!is_wp_error( $rss ) ) :
    $maxitems = $rss->get_item_quantity(5);
    $rss_items = $rss->get_items(0, $maxitems);
    $isc = 'http://dtd.interspire.com/rss/isc-1.0.dtd';
  endif;
?>
<ul class="featured-products">
  <?php if ( $maxitems == 0) : ?>
    <li>No items.</li>
  <?php else : ?>
    <?php foreach ( $rss_items as $item ) : 
      $image = $item->get_item_tags( $isc, 'thumb'); ?>
      <li>...</li>
    <?php endforeach; ?>
  <?php endif; ?>
</ul>
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1 Answer 1

up vote 3 down vote accepted

add this to your feed

    $rss = fetch_feed( $url );
    if ( is_wp_error( $rss ) ) {
       echo $rss->get_error_message();  <---this
    } else {
   // do your stuff here
}

I would also suggest installing the debug toolbar extensions, like "debug-bar-extender".

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1  
The domain name I was trying to access is an alias of another domain name. Pulling the feed from the ultimate domain name successfully returned the results. Your answer assisted me in coming to this realization. Also, following your suggestion(s) I stumbled across Core Control, which allowed me to monitor HTTP requests from my server and their statuses. –  Jonathan Sampson Mar 29 '11 at 19:44
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