XML Help...

[benn_jgh]

I'm trying to create a XML parser that queries Amazon and gets back book information.

Everything is running fine but I can't seem to access items that are nested (ie. the <URL> element)

EG...
<Item>
<Title>
  Book Title
</Title>
<SmallImage>
  <URL>
      http://www.thisiswhatiwant.com
  </URL>
</SmallImage>
</Item>

My PHP code is....

$webserviceURL."&SubscriptionId=".$developerID."&Operation=ItemSearch&ResponseGroup=".$responseGroup."&AssociateTag=".$associateTag."&SearchIndex=".$searchIndex."&Keywords=".$keywords;
$data = file_get_contents($url);
$parser = xml_parser_create();
xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,1);
xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0);
xml_parse_into_struct($parser, $data, $values, $index) or die("Error parsing XML file  :(");



for($i = 0; $i <= count($index['Item']); $i++)
{
echo "<br><br>";

foreach ($index as $key=>$val)
{
$var = $values[$val[$i]]['value'];

switch($key)
{
case "ASIN": echo "ASIN: ".$var; break;
case "Title":   echo "Title: ".$var;     break;
case "Author": echo "Auhtor: ".$var; break;
case "FormattedPrice":     echo "Price: ".$var; break;
case "DetailPageURL":     echo "Page: <a href=\"".$var."\">view</a>"; break;
case "SmallImage": echo "Image: ".$var; break;
}
}
}

[Psycho]

That's because the URL value exists within the URL tags not the SmallImage tags. You could add URL to the case list, but that is not really correct because URL could exist as a subelement of other parent elements.

Your parser will need to be able to account for multiple sub elements with the same name belonging to different parent elements. I use an array for each tag. If a new sub tag is opened I add that tag as a new element to the tags array. When a tag is closed I pop off the last one. Then during the processing I know that if the current tag = "URL" and the last tag = "SmallImage" then it is the value I am looking for.