unittest\Output::variable PHP Method

    public function variable($v, &$depth = 0)
    {
        switch ($v) {
            case is_bool($v):
                if ($v) {
                    return "bool(true)";
                }
                return "bool(false)";
                break;
            case is_null($v):
                if (false === $v) {
                    return "bool(false)";
                }
                return "null";
                break;
            case is_int($v):
            case is_float($v):
            case is_double($v):
            default:
                return sprintf('%s(%s)', gettype($v), $v);
                break;
            case is_string($v):
                return sprintf('string(%s)', $this->use_short_vars($v) ? substr($v, 0, 60) : $v);
                break;
            case is_array($v):
                $r = array();
                foreach ($v as $_key => $_var) {
                    if ($depth >= $this->_maxdepth) {
                        break;
                    }
                    $depth++;
                    $r[] = sprintf('[%s] => %s', $_key, $this->variable($_var, $depth));
                }
                $return = sprintf('array(%s)', implode(", ", $r));
                return $this->use_short_vars($return) ? sprintf('%s...)', substr($return, 0, 60)) : $return;
                break;
            case is_object($v):
                return sprintf('object(%s)', get_class($v));
                break;
        }
        return "unknown";
    }