This document discusses PHP 5.4 and introduces new features such as traits, array dereferencing, binary notation, and upload progress tracking. It provides examples of using traits to reuse code across classes without complicated inheritance. Traits allow for small reusable code sections that can be included in any class while maintaining a precedence order. The document encourages early adoption of new PHP versions for cleaner code and new language features, while also advising testing before deploying to production.

1. PHP 5.4
Begin your love affair with Traits
- Graham Weldon

2. Graham Weldon
PHP developer since... forever
CakePHP contributor/ evangelist
Serial conference speaker
Gaming enthusiast
Beer drinker
http://grahamweldon.com
http://cakedc.com
http://cakephp.org
Twitter: @predominant

3. SydPHP
We’ve got awesome stuff coming up
Visit us! http://sydphp.org
November Meetup
December “Phunconference 2”
January Australia Day BBQ

4. What PHP Version?
PHP 4
PHP 5.1
PHP 5.2
PHP 5.3
PHP 5.4
PHP 6 (Yes, there are some people using it)

5. 100
75
50
25
PHP 3
PHP 4 0
PHP 5
PHP 6
Data courtesy of w3techs.com

6. 80
60
40
20
5.0
5.1
5.2 0
5.3
5.4
Data courtesy of w3techs.com

7. Traditionally slow adopters
PHP 4 to PHP 5 was a painfully slow upgrade for the
global community
Shared hosts retained old versions
Object handling was different
PHP 5.1 on CentOS
People don’t upgrade stable systems
PHP 5.2 massive exposure
Again, people don’t upgrade stable systems
PHP 5.3 used, but not fully

8. Why slow adopters?
Shared hosts
Established applications
Upgrade path
Old excuses

9. Why adopt early?
New language features
More elegant ways to solve problems
Cleaner code
Adopting early gets you noticed

10. What about instability?
Be sensible with production-ready systems
Don’t use the bleeding edge
Confirm functionality
Unit Testing
Integration testing
Load testing
If your tests pass, then phase in the new system
Use sensible reporting / monitoring

11. Enter PHP 5.4 (RC1)

12. PHP 5.4-RC1
RC1 was released for QA on 11th November 2011
Some new features, plenty of bug fixes
You can download it for yourself!
http://qa.php.net/
Give it a try
See if your applications run on it

13. PHP 5.4
New Language Features
and Improvements

14. Upload Progress

15. Binary Notation!

16. Array short syntax
https://wiki.php.net/rfc/shortsyntaxforarrays

17. Array dereferencing
https://wiki.php.net/rfc/functionarraydereferencing

18. Class member access
on instantiation

19. Closures (Current)

20. Closures (Array)
https://wiki.php.net/rfc/indirect-method-call-by-array-var

21. But this doesn’t work... :-(

22. Closures and ‘$this’
https://wiki.php.net/rfc/closures/object-extension

23. Callable Typehint
https://wiki.php.net/rfc/callable

24. JsonSerializable Interface

25. Short Tag echo - Always available

26. Oh, and there is a built-in
web server now. Yay?

27. https://wiki.php.net/

28. PHP Traits

29. Whats the big deal?
Elegant code re-use
Without complicated multiple inheritance
No diamond issues
Kinda like interfaces
But provides implementation
Other languages are doing similar things
PHP is keeping up with the trends

30. A look at
Golang interfaces

31. PHP’s approach
Traits define small sections of reusable code
This code can be included in any class
There is a loading precedence order
Puts developers in control
Looks a feels natural
No need to write things twice
Override capabilities

32. PHP Traits
Example

33. PHP Traits
Example

34. PHP Traits
Real Example

35. Sometimes
Traits need
Adjustment
Maybe log() needs to
be public in your
use case.

36. Change
Methods
as you like
log() is now accessible
to the User instance
in this context.

37. Customise
Further
Change method names
if you’re into that
sort of thing.
Provide preferences.

38. Graham Weldon
Twitter: @predominant
http://grahamweldon.com
Its over! http://cakedc.com
Questions? http://cakephp.org
Get in touch if you want to
know more about this
presentation, PHP in
general, or anything. :-)