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Homephp教程PHP源码php到底是如何获得表单数据的

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当表单按提交后经过浏览器初步处理之后,传到php表单处理页面。
    一般的书上都讲的要么是自动为表单元素分配变量;要么就是将提交的数据保存在全局数组中,然后调用系统特定的自动全局变量数组来获取这些值。看了很久没有明白php到底是如何和浏览器进行信息沟通的,也就是B(客户端)发送数据,到S(服务器)的php表单处理页面,接着就产生相应的变量,这中间php工作机理,哪位老大清楚啊!一直没有明白!

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