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<?phpfunction merge_simplepie() {	if (func_num_args() > 0) {		$args = func_get_args();		$feed = new SimplePie();		$feed->data = array();		foreach ($args as $arg) {			$feed->data = array_merge_recursive($feed->data, $arg->data);		}		usort($feed->data['items'], create_function('$a,$b', 'if ($a->date == $b->date) return 0; return ($a->date < $b->date) ? 1 : -1;'));		return $feed;	}	else trigger_error('Cannot merge 0 instances of SimplePie', E_USER_WARNING);}?>