public function getBookGdata($isbn_id)
{
$objGdata = new Zend_Gdata_Books();
$query = $objGdata->newVolumeQuery();
$isbnno = 'isbn:' . $isbn_id;
$query->setQuery($isbnno);
$feed = $objGdata->getVolumeFeed($query);
$thumbnail_img = null;
foreach ($feed as $entry) {
$thumbnailLink = $entry->getThumbnailLink();
if ($thumbnailLink) {
$thumbnail = $thumbnailLink->href;
} else {
$thumbnail = null;
}
$preview = $entry->getPreviewLink()->href;
$thumbnail_img = !$thumbnail ? '' : '<a href="' . $preview . '"><img src="' . $thumbnail . '"/></a>';
}
return $thumbnail_img;
}
}
print <<<HTML
</table></div></td>
<td width=50% id="previewcell"><div id="viewport"></div>
</td></tr></table><br></body></html>
HTML;
}
/*
* The main controller logic of the Books volume browser demonstration app.
*/
$queryType = isset($_GET['queryType']) ? $_GET['queryType'] : null;
include 'interface.html';
if ($queryType === null) {
/* display the entire interface */
} else {
$books = new Zend_Gdata_Books();
$query = $books->newVolumeQuery();
/* display a list of volumes */
if (isset($_GET['searchTerm'])) {
$searchTerm = $_GET['searchTerm'];
$query->setQuery($searchTerm);
}
if (isset($_GET['startIndex'])) {
$startIndex = $_GET['startIndex'];
$query->setStartIndex($startIndex);
}
if (isset($_GET['maxResults'])) {
$maxResults = $_GET['maxResults'];
$query->setMaxResults($maxResults);
}
if (isset($_GET['minViewability'])) {