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phpsimplexmlnodes

PHP simpleXML parsing

I need currency conversion, euro to dollar.
The European Central bank provides the rates here:
http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml
I can get the USD rate by using the first node, but what if they change the order?
Do I need something more reliable? I have no idea how..

$xml = @simplexml_load_file('http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml');
echo "dollar: " . $xml->Cube->Cube->Cube[0]->attributes()->rate;
Solution

  • Just use XPath to get any node with the attribute @currency equal to "USD", that will do the trick.

    $xref  = simplexml_load_file('http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml');
$nodes = $xref->xpath('//*[@currency="USD"]');

echo $nodes[0]['rate'];