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Creating the Control Logic
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The hr.php file contains all the application control logic. The hr.php file contains the code that starts the application when initiated by an HTTP request from a browser. The PHP application processes the following code to call functions that access the database and create the user interface: require('hr_cn.inc'); require('hr_db.inc'); require('hr_ui.inc'); The code is made up of the main page control logic call the login page, and respond to subsequent user requests.