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php中对用户信息进行更新执行mysql语句时update无法正确更新

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Release： 2016-06-06 09:35:40
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mysql

这是代码这是代码
这个更新语句不知道有没有什么问题这个更新语句不知道有没有什么问题
第一个是打印出update的执行结果 是true 证明sql语句能运行，但是不知道是否能达到目的第一个是打印出update的执行结果 是true 证明sql语句能运行，但是不知道是否能达到目的
数据库中的结果，没有更新成功，但是用户名变为了0，密码没有更变成功数据库中的结果，没有更新成功，但是用户名变为了0，密码没有更变成功
请阁下帮忙分析指点一下

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