PHP Exceptions can greatly assist in implementing various error scenario’s into an application. Before PHP5 one had to resort to specific return values or drastic measures like trigger_error(). Planning exceptions, I found out, is just as important as class design. At any point where a developer needs to handle the possibility of an exception being thrown he needs to know:

• What Exceptions can I expect?
• What Exceptions do I plan to catch?

In this post I’ll show some important aspects to consider when planning exceptions.

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