When we put some XML markup in CDATA section of dom_xml's DomDocument, everything goes OK. But when that markup contains CDATA section ITSELF, the output is invalid due to the unescaped ']]>' sequence in CDATA section. Here's the code:

<?PHP

	$doc = domxml_new_doc ('1.0');
	$root = $doc->append_child ($doc->create_element ('root'));

	$cdata_1 = $root->append_child ($doc->create_element ('cdata-1'));
	$cdata_1->append_child ($doc->create_cdata_section ('Some generic text'));

	print ('<PRE>');

	print ("Test 1. Everything's ok.\n\n");
	print (htmlspecialchars ($doc->dump_mem (TRUE, 'UTF-8')));

	$cdata_1->unlink_node ();

	$cdata_2 = $root->append_child ($doc->create_element ('cdata-2'));
	$cdata_2->append_child ($doc->create_cdata_section ('<?xml version="1.0"?><root><![CDATA[Some XML with CDATA]]></root>'));

	print ("\n\nTest 2. The ]]&gt; symbol sequence in CDATA is not escaped.\n\n");
	print (htmlspecialchars ($doc->dump_mem (TRUE, 'UTF-8')));

	print ('</PRE>');

?>