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php做网页登陆页面，传递数据，变量无效，求解

WBOY
Release： 2016-06-23 14:13:18
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PHP 登陆界面问题

php总共设置了三个变量，判定时发现只有$select有效，其他两个无效，这是怎么回事呀？
求能手回答，赶任务，急
帮个忙，改改，不胜感激
登陆界面代码：



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php做网页登陆页面，传递数据，变量无效，求解
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