Handles opening tags for XML parsing in xmlrpc_message_parse().
function xmlrpc_message_tag_open($parser, $tag, $attr) {
$xmlrpc_message = xmlrpc_message_get();
$xmlrpc_message->current_tag_contents = '';
$xmlrpc_message->last_open = $tag;
switch ($tag) {
case 'methodCall':
case 'methodResponse':
case 'fault':
$xmlrpc_message->messagetype = $tag;
break;
// Deal with stacks of arrays and structs
case 'data':
$xmlrpc_message->array_structs_types[] = 'array';
$xmlrpc_message->array_structs[] = array();
break;
case 'struct':
$xmlrpc_message->array_structs_types[] = 'struct';
$xmlrpc_message->array_structs[] = array();
break;
}
xmlrpc_message_set($xmlrpc_message);
}