Exception Handling in PHP

A lightning Talk about exception handling best practices in PHP for one of our customers

Transcript

1. try { Exception Handling in PHP } A brief introduction
2. Exception != Error
3. – docs.oracle.com “An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions.”
4. – php.net/manual “When an exception is thrown, code following the statement will not be executed, and PHP will attempt to find the first matching catch block. If an exception is not caught, a PHP Fatal Error will be issued with an "Uncaught Exception ..." message”
5. Application Layers Presentation Business Data NoDatabaseConnectionException NoResultException EmptyResultException InvalidConfigurationException HTTP/404 HTTP/500
6. Example EVIL!
7. – Me “Because a DBAL does not know how to handle an empty result… But the business logic does!”
8. Done right
9. Done right
10. Pass Exceptions through layers
11. Exceptions
12. DBAL
13. Repository
14. Controller
15. – OSS Development Wisdom “An API method should always return an expected result or throw an exception.”
16. Thanks ;) frankneff.ch - @frank_neff - github.com/frne