我们的银行场景需要一个简单的浏览器界面，银行出纳员使用这个界面执行php模块中实现的核心函数。
Our bank scenario requires a simple browser interface that bank tellers use to perform the core functions you implemented earlier in a PHP module.
这些考虑因素超出了本文的范围，本文只希望实现一个简单的单页面浏览器应用程序。
Such concerns are out of scope for this bank scenario article, which focuses only on implementing a single-page browser application with simple characteristics.
下面第一个简单的脚本将打开一个数据库连接，并向浏览器发送消息确认该连接。
The first simple script here will open a database connection and confirm that with a message to the browser.
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