数组中的索引关联数据全部统一转换成json对象

public static function encode(&$var)
    {
        return '{'.implode(',',self::encodeExcute($var)).'}';
    }

    private static function encodeExcute(&$var)
    {
        $json = array();
        switch (gettype($var))
        {
            case 'array':
                foreach($var as $key=>$value)
                {
                    if(is_array($value))
                    {
                        $json[] = '"'.$key.'":{'.implode(',',self::encodeExcute($value)).'}';
                        //$json[$key] = self::encode($value);
                    } elseif (is_object($value)) {
                        $json[] = "\"{$key}\":".json_encode($value->attributes);
                    } else {
                        echo 'ERROR 未知类型,还未解析';
                        Yii::app()->end();
                    }
                }
                break;
            case 'object':
                break;
        }
        return $json;
    }