8. Error Handling

Overview

By the end of this chapter, you will be able to describe the different error levels in PHP; use a custom error handler; trigger and log error messages; catch fatal errors at shutdown; explain how exceptions work in PHP; define, use, and catch multiple exception classes; and register a top-level exception handler.

Also, in this chapter, you will trigger so-called user-level error messages and how they can be helpful. In the last part, you will learn about exceptions and how they can be used to control script flow.