The document provides an overview of using Composer with WordPress, detailing its purpose in managing project dependencies and versions. It explains various Composer commands for installing, updating, and managing packages, while also discussing custom repository configurations and semantic versioning. Additionally, it includes practical use cases for integrating Composer into WordPress projects.

1. Using Composer
with WordPress
Micah Wood
@wpscholar
wpscholar.com/loopconf2015

2. What is ?

3. Manages Project
Dependencies and Versions

4. Why Use Composer?

5. Eliminates
Duplication

6. Consistent
Versioning

7. Reusable
Code

8. Documentation of
Dependencies

9. Composer Features

10. Automatic
Package Installation

11. Bulk Package
Updates

12. Class and File
Autoloading

13. Recursive
Dependencies

14. Package
Discovery

15. Installing Composer

16. Go to https://getcomposer.org/
Click ‘Getting Started’
Find your install method

17. $ composer diagnose
Check system for common errors

18. Using Composer

19. $ composer init
Create a new composer.json file

20. $ composer validate
Validate your composer.json file

21. $ composer require package
Adds package to composer.json and installs

22. $ composer require package --dev
Adds package to composer.json as a dev requirement and installs

23. $ composer install
Downloads and installs all dependencies

24. $ composer install --no-dev
Install composer dependencies for production environment

25. $ composer update
Checks for and installs package updates

26. $ composer update package
Checks for and installs a single package update

27. $ composer remove package
Removes package from composer.json and uninstalls

28. $ composer search package
Discover packages on packagist.org

29. $ composer config repositories.package
git git@github.com:username/package.git
Add a custom repository

30. Custom Repositories Require
a composer.json File
Run composer init to generate

31. Specifying Versions

32. Exact Version
1.0.2

33. Range of Versions
>=1.0,<2.0

34. Wildcard Version
1.0.*

35. Next Significant Release Version
~1.2

36. Version Stability Flags
@stable
@rc
@beta
@alpha
@dev

37. Semantic Versioning
semver.org

38. 2.3.1
Increment when you make breaking changes
Major Version

39. 2.3.1
Increment when you add backwards compatible features
Minor Version

40. 2.3.1
Increment when you make backwards compatible bug fixes
Patch Version

41. How Composer Works

42. composer.json
How you declare your dependencies

43. composer.lock
How Composer stores
your dependencies

44. vendor directory
Where composer installs your packages

45. autoload files
require __DIR__ . '/vendor/autoload.php';

46. Using Composer
with WordPress

47. Use Case #1
Custom Plugin or Theme

48. Use Case #2
Custom Site or App

49. $ composer require johnpbloch/wordpress
Add WordPress as a dependency

50. $ composer config repositories.wpackagist
composer http://wpackagist.org/
Add wpackagist.org as a repository

51. $ composer require composer/installers
Enables WordPress themes and plugins to be put in their respective directories

52. Setup WordPress Paths
Places WordPress and its themes and plugins in their respective directories

53. File Structure

54. Project Bootstrapping

55. $ composer create-project package
Downloads project and runs `composer install`

56. $ composer create-project wpscholar/wp-skeleton
Setup a new WordPress project

57. $ composer create-project wpscholar/vvv-skeleton
Setup a new WordPress project using VVV

58. Thank You!
Micah Wood
@wpscholar
wpscholar.com/loopconf2015