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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- HTML code
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