Handling errors

Properly handling the errors that invariably occur in software applications is of the utmost importance. This, again, is a topic that arguably should have been covered prior to coding our application, rather than at this late stage. Luckily, though, as we have been leaning on tools within the Yii Framework to autogenerate much of our core application skeleton, our application is already taking advantage of some of Yii's error handling features.

Yii provides a complete error handling framework based on PHP 5 exceptions, a built-in mechanism for handling program failures through centralized points. When the main Yii application component is created to handle an incoming user request, it registers its CApplication::handleError() method to handle PHP warnings and notices. It registers its CApplication::handleException() method to handle uncaught PHP exceptions. Consequently, if a PHP warning/notice or an uncaught exception occurs during the application execution, one of the error...