<?php
$xml = <<<END
<?xml version='1.0' encoding='ISO-8859-1'?>
<!DOCTYPE words SYSTEM "words.dtd">
<words>
<word id="word_1">Alfa</word>
<word id="word_2">Beta</word>
<word id="word_3">Gamma</word>
<word id="word_4">Delta</word>
<word id="word_5">Zeta</word>
</words>
END;
$xmlHitzakDok = new DOMDocument();
$xmlHitzakDok->loadXML($xml);
$xPath = new DOMXPath($xmlHitzakDok);
foreach ($xPath->query('//words/word') AS $item)
{
echo $item->getAttribute('id') . " = " . $item->nodeValue . "\n";
}