Description:
------------
PHP Version 5.1.0-dev, configure with:
'./configure' '--prefix=/usr/' '--with-apxs2' '--with-gettext'
'--with-iconv' '--with-mysql' '--enable-mbstring=ru' '--enable-mbregex'
'--enable-mbstr-enc-trans' '--disable-short-tags' '--with-xsl'
'--with-libxml' '--without-sqlite' '--enable-soap'

libxslt Version     1.1.8
libxml Version      2.6.11
libexslt Version    1.1.8

apache 2.0.48

XSLTProcessor don't process 'omit-xml-declaration' in 'xsl:output'. If 'omit-xml-declaration' set to 'yes' than xml declaration will be output; when set to 'no', than xml declaration will be output too.


Reproduce code:
---------------
<?php
$xsl = new DomDocument();
$xsl->loadXML(
'<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<xsl:output method="xml" omit-xml-declaration="no"/>
<xsl:template match="/">
    <xsl:value-of select="."/>
</xsl:template>
</xsl:stylesheet>'
);

$xml = new DomDocument;
$xml->loadXML('<?xml version="1.0"?><null>test</null>');

$proc = new XSLTProcessor();
$proc->importStylesheet($xsl);

$dom = $proc->transformToDoc($xml);
echo $dom->saveXML();
?>

Expected result:
----------------
test

Actual result:
--------------
<?xml version="1.0"?>
test