SimplePie::__call PHP Method

    public function __call($method, $args)
    {
        if (strpos($method, 'subscribe_') === 0) {
            $level = defined('E_USER_DEPRECATED') ? E_USER_DEPRECATED : E_USER_WARNING;
            trigger_error('subscribe_*() has been deprecated, implement the callback yourself', $level);
            return '';
        }
        if ($method === 'enable_xml_dump') {
            $level = defined('E_USER_DEPRECATED') ? E_USER_DEPRECATED : E_USER_WARNING;
            trigger_error('enable_xml_dump() has been deprecated, use get_raw_data() instead', $level);
            return false;
        }
        $class = get_class($this);
        $trace = debug_backtrace();
        $file = $trace[0]['file'];
        $line = $trace[0]['line'];
        trigger_error("Call to undefined method {$class}::{$method}() in {$file} on line {$line}", E_USER_ERROR);
    }