Description:
------------
The combination of simplexml and htmlspecialchars() creates massive memory leak. In a about 500k calls to htmlspecialchars() on a value in simplexml, it eats up over 1GB of memory.


Reproduce code:
---------------
$xml = simplexml_load_file('some_xml_file.xml');
$val = '';

for ($index=0; $index<10000000; $index++)
{
	$val = htmlspecialchars($xml->title);
}


Expected result:
----------------
If you run the above script and watch Windows Task Manager, you will see memory usage continuous to go up non-stop.