https://tracy.nette.org

1. https://tracy.nette.org

2. This is error notice or warning in PHP.

3. This is uncaught exception in PHP. There is a lot o information.
Which is not always positive when you can‘t orient in it.

4. Thats why there are some libraries to vizualize the error
better. Tracy is the most user friendly one ☺

7. composer require tracy/tracy
You can install Tracy using Composer.

8. Or you can download whole Tracy as single PHAR file from
GitHub.

9. TracyDebugger::enable();
Enabling Tracy is really easy.

10. We will look at previous PHP error Undefined variable.

11. And this is the same error handled by Tracy.

12. There is also complete callstack.

13. You can click and see source code …

14. …and complete arguments.

15. What about the previous exception?

16. Again. Tracy shows friendly, easy to use and intuitive face.

17. Tracy handles all other errors, this is example of parse error.

18. Hinting Allowed
Tracy hints and corrects you just like a good friend watching
your back.

19. Yes, the „did you mean $form“ was added to PHP notice by
Tracy. It analyzes context and suggests you the correct
variable name.

20. It can fix that error as well! One click only.

21. Tracy Bar
Tracy Bar is about information. Information matters.

23. This is Tracy Bar. You can drag it and move anywhere on
screen. And open panels via click on „tabs“.

26. You can click on explain and see result of EXPLAIN SQL
command. You can easily check whether query uses indexes.

27. You can enjoy it even more with plugins. There are a lot of
Tracy Bar plugins. For Doctrine, Translating, Mailing etc…

28. Dumping variables

29. In PHP there are functions like print_r() and var_dump() for
dumping variables.

30. But the output is not friendy. Is looks like mess.

31. Thats why Tracy has its function for dumping variables. It is
called simply dump().

32. Output is dynamic, you can collapse or open nested arrays or
objects. It works in CLI too, with colors.

33. When you dump more than one variable or expression, you
appreciate showing location.

34. Before…

35. After

36. Development
vs
Production
All the time we have seen Tracy in development mode. But it
can be switched to production mode too. In this mode it
displays no sensitive information. And it logs all errors.

37. This is uncaught exception in production mode. The „red
screen“ which we have seen before, is created and logged to
server as HTML file.

38. You can use Tracy
in any codebase

39. Tracy can be used with WordPress, Laravel, Symfony, CakePHP,
in any legacy code, …

40. https://nette.org
Tracy is part of Nette, family of mature and standalone
opensource components for PHP. It had been rated by
SitePoint magazine as 3rd most popular in the world in 2015.

41. https://nette.org
These components may bring happines to your work.

42. https://tracy.nette.org