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本文档使用 PHP中文网手册 发布
参见 SPL 接口 和 预定义类
[#1] articice at ua dot fm [2015-07-01 15:24:13]
Note that PHP extensions also provide interfaces you can implement, for example JsonSerializable.
Here is the full list http://php.net/manual/en/refs.basic.other.php