[PHP] Combining 2 DOM XML nodes from different documents

[Eli]

Hi,

<?php
$x1 = <<<EOT
<a p1="v1">
        <a1 p1="vv1"/>
</a>
EOT;
$x2 = <<<EOT
<b p1="v1">
        <b1 p1="vv1"/>
</b>
EOT;
$X1 = new DOMDocument();
$X1->loadXML($x1);
$X2 = new DOMDocument();
$X2->loadXML($x2);

$X1->firstChild->appendChild($X2->firstChild->cloneNode(true));

echo htmlspecialchars($X1->saveXML());
?>


I got an error in the line $X1->firstChild->appendChild...
[01-Feb-2007 22:20:29] PHP Fatal error:  Uncaught exception 
'DOMException' with message 'Wrong Document Error' in 
E:\www\mysite\htdocs\combine.php:17

How can I combine these 2 XMLs to get:
<a p1="v1">
        <a1 p1="vv1"/>
        <b p1="v1">
                <b1 p1="vv1"/>
        </b>
</a>

-thanks! :-)

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