PHP4 XML DOM write to document

I wrote a script which adds a element to an xml file with attributes added using the php5 DOM objects.

[code=php]
$xml_dom = new DOMDocument(); // Load DOM Object
$xml_dom -> load(“db.xml”); // Load xml databse into the object

$newsletter_log = $xml_dom -> getElementsByTagName(‘newsletter_log’)->item(0); // Asign the element to a vaible
$newElement = $xml_dom -> createElement(‘log’); // Create a new elemnt and asign to varible
$newsletter_log -> appendChild($newElement); // Apend the new element node into the parent element
$newElement -> setAttribute(‘action’, $act); // Setting new atriubts to the element
$newElement -> setAttribute(’email’, $_GET[“email”]);
$newElement -> setAttribute(‘time/date’, date(“H:i d.m.y”));
$newElement -> setAttribute(‘recommended’,$recommended);
$xml_dom -> save(“db.xml”); // Save new XML docmument

[/code]

However, I have just been notified that the script will run in a php4 environment, which I have no experience of, especially in using the old DOM extensions. I know that DOM is not always turned on with php4, how can I find this out (I have access to a phpinfo file)? Also, how can I modify the script to work with php4?

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