Description:
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Xml_rpc php extension uses libxml. For correct parsing huge data libxml contains a constant - LIBXML_PARSEHUGE, but I can't use it in xml_rpc extension.
I can use it, for example, in simplexml extension:
$res = simplexml_load_file($file, 'SimpleXMLElement', LIBXML_PARSEHUGE);

Now I can't process a large file (more then 10Mb) with xmlrpc_decode as he will always return null.