<?php
require_once 'Zend/Loader.php'; // the Zend dir must be in your include_path
Zend_Loader::loadClass('Zend_Gdata_Books');

extract($_POST); //get data from form

$books = new Zend_Gdata_Books();
$keywords = ($isbn);
$query = $books->newVolumeQuery();
$query->setQuery($keywords);
$feed = $books->getVolumeFeed($query);

}
      <div>
      <?php echo $feed->totalResults; ?> result(s) found.
      </div>

      <div id="results">
      <?php $x = 1; ?>
      <?php foreach ($feed as $entry): ?>

        <?php
        //print_r($entry);
        $book = new stdClass;

        // get title
        if (is_array($entry->getTitles())) {
          foreach ($entry->getTitles() as $title) {
            $book->titles[] = $title->getText();
          }
        }

        // get authors
        if (is_array($entry->getCreators())) {
          foreach ($entry->getCreators() as $creator) {
            $book->authors[] = $creator->getText();
          }
        }

        // get publishers
        if (is_array($entry->getPublishers())) {
          foreach ($entry->getPublishers() as $publisher) {
            $book->publishers[] = $publisher->getText();
          }
        }

        // get publication date
        if (is_array($entry->getDates())) {
          $arr = $entry->getDates();
          $book->pubdate = (is_object($arr[0])) ?
           $arr[0]->getText() : 'Unspecified';
        }

        // get ISBN numbers
        if (is_array($entry->getIdentifiers())) {
          foreach ($entry->getIdentifiers() as $id) {
            if (preg_match('/ISBN/', $id->getText())) {
              $book->isbn[] = $id->getText();
            }
          }
        }

        // get first subject
        if (is_array($entry->getSubjects())) {
          $arr = $entry->getSubjects();
          $book->subject = is_object($arr[0]) ?
           $arr[0]->getText() : 'Unspecified';
        }

        // get first description
        if (is_array($entry->getDescriptions())) {
          $arr = $entry->getDescriptions();
          $book->desc = is_object($arr[0]) ?
           $arr[0]->getText() : 'No description available';
        }
        ?>

        <div class="entry">
          <div class="thumbnail">
            <img src="<?php echo ($entry->getThumbnailLink()) ?
             $entry->getThumbnailLink()->getHref() : ''; ?>" />
          </div>
          <div class="data">
          <?php echo $x; ?>. <?php echo ucwords(@implode(': ',
           $book->titles)); ?><br/>
          <?php echo @implode(', ', $book->authors); ?> |
          <?php echo @implode(', ', $book->publishers); ?> |
          <?php echo $book->subject; ?> |
          <?php echo date('d M Y', strtotime($book->pubdate)); ?> <br/>
          <span class="desc"><?php echo $book->desc; ?></span> <br/>
          <span class="small"><?php echo @implode(', ', $book->isbn); ?> |
            <a href="<?php echo $entry->getInfoLink()->getHref(); ?>">
            More information</a>
          </span>
          </div>
        </div>
        <?php $x++; ?>
      <?php endforeach; ?>




?>