如何在PHP CodeIgniter中实现最后的错误处理？

Question

In web frameworks I've built and used in the past, there's been some means to specify some form of "last resort" error handler. I'd appreciate any help in determining how to accomplish that goal using CodeIgniter, which is a legacy part of a product I'm working on.

The goal of the last resort error handler is to capture any exception that's bubbled up, unhandled, from the application logic. Since, at this high framework level, the handler can't resolve the exception, a typical implementation is to log the error (with associated context) and present a user-friendly error page rather than a scary, technical exception page.

I wasn't able to find support in the CodeIgniter documentation, but I expect there must be support for this. Did I not find support because I should use PHP's set_error_handler() and set_exception_handler()? (I'm new to PHP, but expert in Java, Ruby/Rails.)

Thanks in advance for you guidance!

Answer 1

It seems CodeIgniter 2.0+ registers the handlers you specified to load the CI_Exceptions class. I usually put a MY_Exceptions library in the application/libraries folder to "catch" them before CodeIgniter. I'd rather handle them gracefully than let CI show it's error pages.