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位演算有什么用

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Jun 13, 2016 am 10:36 AM

codegtltphp

位运算有什么用？
好吧这是个无聊的问题，似乎我从没见过PHP代码中出现这种操作符。
谁能举一个例子，在什么情况会用到 > ^ 这些位运算操作符，或者它们适合什么场景。

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其实除了加密验证，状态权限奇偶验证等，好像想不出其他的用处！

比如变量换值php真的需要吗？可以节约内存空间吗？

一起坐等回答。
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以前读书学C、java的时候都几乎没用过
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