title: php script return specific xml tag value
body: <p>i need php script to extract the ip address from the following xml page www.ip-address.com/test.xml</p>
  
  <pre><code>&lt;dnstools&gt;
  &lt;service_provider&gt;Domain Tools&lt;/service_provider&gt;
  &lt;provider_url&gt;http://www.domaintools.com/&lt;/provider_url&gt;
  &lt;date&gt;Wed, 12 May 2010 00:43:07 GMT&lt;/date&gt;
  &lt;unix_time&gt;1273624987&lt;/unix_time&gt;
  &lt;ip_address&gt;94.252.157.241&lt;/ip_address&gt;
  &lt;hostname&gt;94.252.157.241&lt;/hostname&gt;
  &lt;blacklist_status&gt;Clear&lt;/blacklist_status&gt;
  &lt;remote_port&gt;43577&lt;/remote_port&gt;
  &lt;protocol&gt;HTTP/1.0&lt;/protocol&gt;
  &lt;connection&gt;keep-alive&lt;/connection&gt;
  &lt;keep_alive/&gt;
  </code></pre>