note 86031 added to function.simplexml-element-construct

A note about the undocumented parameters:

$ns (string): namespace prefix or URI
$is_prefix (bool): TRUE if $ns is a prefix, FALSE if it's a URI; defaults to FALSE

E.g.:

<?php
$xml_string = '<xml xmlns:foo='uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882'>
<foo:bar>..................';

$a = new SimpleXMLElement($xml_string, NULL, FALSE, 'foo', TRUE);
$b = new SimpleXMLElement($xml_string, NULL, FALSE, 'uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882', FALSE);
?>

However, I don't know exactly what these parameters are used for. They don't seem to be of much help when dealing with namespaces :-?
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Manual Page -- http://www.php.net/manual/en/function.simplexml-element-construct.php
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