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Jun 23, 2016 pm 01:45 PM

本人学过php，做过类似网上购物这样的网站

最近在看协议方面的东西，接触了socket tcp/ip协议之类的东西

如果我没有理解错的话，socket就像是一个api函数包，用这个包可以实现tcp和udp协议
那么我的问题是：当我们用php做一个网站的时候，比如涉及到服务器和客户端交互信息的时候，是用什么协议实现的？是类似http协议这样的最高层的协议吗？是不是这里和tcp这样的协议没有什么直接的关系？？

谢谢～～

回复讨论(解决方案)

是的，与 tcp 协议没有直接的关系
tcp/ip 是底层通讯协议
socket 是 tcp/ip 的包装
http 构建与 socket 之上

浏览器是基于http协议走的，tcp/ip也有关系。
具体你可以查看http协议和tcp/ip的差别。

本质上也是tcp/ip传输协议。在此基础上对传输的数据规定了一定的格式，比如规定哪部分是head，哪部分是data等等，这就形成了http协议。
这就好比我们用socket传输一段json格式的字符串，那么在收到该字符串后怎么从中提取有效数据，一个道理。
我是这么理解的

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