xml element exists

[jriggs]

<?xml version="1.0"?>
<Addresses>
<Address ID="1">
   <Address2>101 MAIN ST</Address2>
   <City>BIGTOWN</City>
   <State>OH</State>
   <Zip5>22222</Zip5>
   <Zip4></Zip4></Address>
<Address ID="2">
   <Address2>420 HIGH ST</Address2>
   <City>MYTOWN</City>
   <State>AK</State>
   <Zip5>54321</Zip5>
   <Zip4>2562</Zip4></Address>
</Addresses>

 

My code is reading the above xml, but if there was an error the xml will be different, for example:

 

<?xml version="1.0"?>
<Addresses>
<Address ID="1">
  <Error>
    <Number>-2147219401</Number>       
    <Source>blah</Source>  
   <Description>Address Not Found.  </Description>
   <HelpFile></HelpFile> 
   <HelpContext>1000440</HelpContext>
  </Error>
</Address>
<Address ID="2">
   <Address2>420 HIGH ST</Address2>
   <City>MYTOWN</City>
   <State>AK</State>
   <Zip5>54321</Zip5>
   <Zip4>2562</Zip4></Address>
</Addresses>

 

Currently, I am accessing the elements like this:

$xml = new SimpleXMLElement($xml_txt);

$first_address = $xml->Address[0]->Address2;

$second_address = $xml->Address[1]->Address2;

 

This code doesn't work when the error xml is returned.  There will always be 2 items in the xml.  How can I tell which (if any) address has an 'error' node?  Also, I need to know which of the 2 IDs has the error.

 

[salathe]

You can check whether there is an Error node by using isset, for example, isset($xml->Address[0]->Error)

[jriggs]

Thanks, cant believe I didnt think of that on my own.  trying to make it harder than it needed to be!