I am trying to parse an individual element from an XML string using PHP. The issue is that this individual element occurs before the entries start. The XML is below:

```
<?xml version="1.0" encoding="UTF-8"?>
<feed gd:kind="shopping#products"         gd:etag="&quot;lm_25heFT8yiumci9EH1kItJBpg/Sj5O9aXZ82PKpx3N2C3uQYMhNYE&quot;"     xmlns="http://www.w3.org/2005/Atom" xmlns:gd="http://schemas.google.com/g/2005" xmlns:openSearch="http://a9.com/-/spec/opensearchrss/1.0/" xmlns:s="http://www.google.com/shopping/api/schemas/2010">
 <openSearch:totalResults>64</openSearch:totalResults>
 <openSearch:startIndex>1</openSearch:startIndex>
 <openSearch:itemsPerPage>25</openSearch:itemsPerPage>
 <entry >...</entry>
 <entry >...</entry>
</feed>

```

I am trying to parse out the "64" in the opensearch:totalResults tag. How do I this and assign it to a variable in php? I tried:

```
$url = 'url of xml feed'; 
$xml = simplexml_load_file($url); 
$entries =$xml->entry[0]->openSearch:totalResults;
      // also tried $entries =$xml->openSearch:totalResults;

echo $entries;

```

but it's not working. Any advice?