public static function get_opt($aliases = array())
    {
        $args = array();
        $bool = array();

        // find boolean (no value) options
        foreach ($aliases as $key => $alias) {
            if ($pos = strpos($alias, ':')) {
                $aliases[$key] = substr($alias, 0, $pos);
                $bool[] = $key;
                $bool[] = $aliases[$key];
            }
        }

        for ($i=1; $i < count($_SERVER['argv']); $i++) {
            $arg   = $_SERVER['argv'][$i];
            $value = true;
            $key   = null;

            if ($arg[0] == '-') {
                $key = preg_replace('/^-+/', '', $arg);
                $sp  = strpos($arg, '=');

                if ($sp > 0) {
                    $key   = substr($key, 0, $sp - 2);
                    $value = substr($arg, $sp+1);
                }
                else if (in_array($key, $bool)) {
                    $value = true;
                }
                else if (strlen($_SERVER['argv'][$i+1]) && $_SERVER['argv'][$i+1][0] != '-') {
                    $value = $_SERVER['argv'][++$i];
                }

                $args[$key] = is_string($value) ? preg_replace(array('/^["\']/', '/["\']$/'), '', $value) : $value;
            }
            else {
                $args[] = $arg;
            }

            if ($alias = $aliases[$key]) {
                $args[$alias] = $args[$key];
            }
        }

        return $args;
    }