[PHP] Using Amazon Web Services - Publisher Results

[Nicole]

I read these 2 articles to get me started with using Amazon Web Services:

http://www.devshed.com/c/a/PHP/Usin...-SOAP-part-1/ &&
http://www.devshed.com/c/a/PHP/Usin...-SOAP-part-2/

I have a page with a Table of Contents linking to specific Browse Nodes that
would be of interest to our viewers.

I'd like to add a link to a results page with books published by Nolo Press.
To do this I'm passing the name "nolo" via the link.

Here is the code I have so far.  Note, that it works perfectly when I only
want to see a list from a Browse Node.

CODE::
----------------------------
//get publisher information
$publisher = $_GET['publisher'];
if ($publisher == "nolo")
{
  $publisher = "Nolo Press";
}

// if keyword is set, get those results
if (isset($keyword))
{
    $catalogParams = array(
                'keyword' => htmlentities($keyword),
                'page' => $page,
                'mode' => 'books',
                'tag' => 'tag',
                'sort' => '+pmrank',
                'type' => 'lite',
                'devtag'=> 'tag'
    );

    // invoke the method
    $result = $proxy->KeywordSearchRequest($catalogParams);
    $catalogItems = $result['Details'];
    $catalogTotal = $result['TotalResults'];
}
else
{
// get items from the catalog
// sort order is default
$catalogParams = array(
            'browse_node' => $node,
            'page'        => $page,
            'mode'        => 'books',
            'tag'         => 'tag',
            'type'        => 'heavy',
            'devtag'      => 'tag'
);
$catalogResult = $proxy->BrowseNodeSearchRequest($catalogParams);
$catalogTotal = $catalogResult['TotalResults'];
$catalogItems = $catalogResult['Details'];
}

if (isset($publisher))
{
//THE FOLLOWING LINE IS LINE 115
foreach ($catalogItems as $i)
{
  if($i['Manufacturer'] == $publisher)
  {
   $catalogParams = array(
    'browse_node' => $node,
      'page'        => $page,
      'mode'        => 'books',
      'tag'         => 'tag',
      'type'        => 'heavy',
      'devtag'      => 'tag'
   );

   $catalogResult = $proxy->BrowseNodeSearchRequest($catalogParams);
   $catalogTotal = $catalogResult['TotalResults'];
   $catalogItems = $catalogResult['Details'];
  }
}
}

// format and display the results
?>

<!-- inner catalog table -->

  <table border="0" cellspacing="5" cellpadding="0">
  <?

  // parse the $items[] array and extract the necessary information
  // (image, price, title, author, item URL)
//THE FOLLOWING LINE IS LINE 209
  foreach ($catalogItems as $i)
  {
  ?>
  <tr>
  <td align="center" valign="top" rowspan="3">
<a href="book.php?asin=<? echo $i['Asin']; ?>">
<img border="0" src=<? echo $i['ImageUrlSmall']; ?>></a></td>
  <td><b><a href="book.php?asin=<? echo $i['Asin']; ?>">
<? echo $i['ProductName']; ?></a></b> /
<? echo implode(", ", $i['Authors']); ?></td>
  </tr>
  <tr>
  <td align="left" valign="top"><font size="-1">
<!--List Price: <? echo $i['ListPrice']; ?> / Amazon.com-->
Price: <? echo $i['OurPrice']; ?> / Used Price:
<? echo $i['UsedPrice'] ?>
</font></td>
  </tr>
  <tr>
  <td colspan=2>&nbsp;</td>
  </tr>
  <?
  }
  ?>
  </table>
----------------------------------------------------------
END CODE

I get this error only if $publisher is set (these lines are marked above):

Warning: Invalid argument supplied for foreach()
in /home/www/palawport/amazon/sample7.php on line 115

Warning: Invalid argument supplied for foreach()
in /home/www/palawport/amazon/sample7.php on line 209

I did a little test and tried to see if catalogItems had any data.  The
following code ONLY returned the Publisher ... nothing else.

print_r($catalogItems);
print "<p>";
print_r($publisher);
print "<p>";
print_r($keyword);
exit;

Suggestions are welcome :)

Thanks
Nicole

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