Password protect output PDF document 密码保护输出PDF文件
In this start of our output script, we simply create variables to store our username and password for access to the database located at localhost.
在输出脚本的开头，我们只是创建变量来存储可以访问位于本地主机的数据库的用户名和密码。
No output has been produced, as no password has been set.
因为没有设置密码，所以没有产生输出。
You can see from the above output that the number of weeks before password expiry is 4.
在上面的输出中可以看到密码到期之前的周数是 4。
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