PHP DOM XML - Create Multiple Namespace Attributes? - php

Question

I'm working on some PHP to create XML from a database using the DOM extension.
Basically, I need to create a NameSpace and add 3 attributes to it:
<NameSpaceName xmlns="uri:xxx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="uri:xxx">
The full code i've written is below:
include_once("includes/connect.php");
$sql = ("SELECT * FROM tableName");
$query = mysql_query($sql) or die("Error: " . mysql_error());
// create a new XML document
$doc = new DomDocument('1.0', 'UTF-8');
// create root node
$root = $doc->createElementNS('uri:xxx', 'PayerRecords');
$root = $doc->appendChild($root);
$root->setAttributeNS('http://www.w3.org/2000/xmlns/' ,'xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
$root->setAttributeNS('http://www.w3.org/2000/xmlns/' ,'xsi:schemaLocation', 'uri:xxx');
// process one row at a time
while($row = mysql_fetch_assoc($query)) {
// add node for each row
$occ = $doc->createElement('Content');
$occ = $root->appendChild($occ);
// add a child node for each field
foreach ($row as $fieldname => $fieldvalue) {
$child = $doc->createElement($fieldname);
$child = $occ->appendChild($child);
$value = $doc->createTextNode($fieldvalue);
$value = $child->appendChild($value);
} // foreach
} // while
// get completed xml document
$xml_string = $doc->saveXML();
echo $xml_string;
But when I execute the above I get this error:
Fatal error: Uncaught exception
'DOMException' with message 'Namespace
Error' in
xml.php:21
Stack trace: #0
xml.php(21):
DOMElement->setAttributeNS('http://www.w3.o...', 'xsi:schemaLocat...',
'uri:xxx...') #1 {main} thrown
in
xml.php
on line 21
Line 21 is the second 'setAttributeNS' line.
Can anyone see where i'm going wrong?

Answer 1

schemaLocation is not declared in the namespace http://www.w3.org/2000/xmlns/ but in http://www.w3.org/2001/XMLSchema-instance
<?php
// create a new XML document
$doc = new DomDocument('1.0', 'UTF-8');
// create root node
$root = $doc->createElementNS('http://xxx', 'PayerRecords');
$root = $doc->appendChild($root);
$root->setAttributeNS('http://www.w3.org/2000/xmlns/' ,'xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
$root->setAttributeNS('http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation', 'http://xxx');
echo $doc->savexml();
prints
<?xml version="1.0" encoding="UTF-8"?>
<PayerRecords xmlns="http://xxx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xxx"/>

Answer 2

I didn't quite get it the first time so I'm posting my answer in more detail. Maybe someone finds this helpful.
// create DOM document
$xml = new DomDocument('1.0', 'UTF-8');
// create root element
$el = $xml->createElementNS('http://namespaceA/url/here/', 'rootelement');
// to be able to add new namespaces we must first add namespace 'xsi'
// third parameter is important (use your main namespace with .xsd)
$root->setAttributeNS(
'http://www.w3.org/2001/XMLSchema-instance',
'xsi:schemaLocation',
'http://namespaceA/url/here/ http://namespaceA/xsdfile/here.xsd');
// add new namespace
$el->setAttributeNS(
'http://www.w3.org/2000/xmlns/',
'xmlns:namespaceB',
'http://namespaceB/url/here/');
// add root element to DOM
$xml->appendChild($el);
This mail archive message was very helpful: http://www.mail-archive.com/php-general#lists.php.net/msg135362.html.

Answer 3

replace line 21 with
$root->setAttributeNS(
'http://www.w3.org/2001/XMLSchema-instance',
'xsi:schemaLocation',
'http://xxx http://xxx/xxx.xsd'
);
xsi:schemaLocation is not defined in the http://www.w3.org/2000/xmlns/ or your namespace, but in xsi. so you have to use the (complete) xsi namespace uri as the first parameter.
and: you don't need to call setAttributeNS() twice: the single line above generates both the xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" and xsi:schemaLocation="http://xxx http://xxx/xxx.xsd" attributes.