Foundations of Zend Framework

Full frameworks are heavy, slow, and coupled internally, forcing us to create applications tightly coupled to a toolset. On the other hand are microframeworks leading to a NIH (Not invented here) approach because of missing functionality, with a minefield of tradeoffs connecting to other components.

Zend Framework 3 (ZF3) features fully separated components, and is blazing fast (up to 15X) with newly rewritten Service and Event Managers. We'll see beginning skeleton apps that leverage ZF3 as a PSR-7 middleware microfamework, or as a full stack framework, with highly connective APIs. Code samples of the foundational pieces; Event Manager, Service Manager, and Module Manager, will be shared allowing attendees to quickly get started using Zend Framework 3.

Transcript

1. Foundations of Zend Framework By: Adam Culp Twitter: @adamculp https://joind.in/14923
2. Foundations of Zend Framework  About me  PHP 5.3 Certified  Consultant at Zend Technologies  Organizer SoFloPHP (South Florida)  Organizer SunshinePHP (Miami)  Long Distance (ultra) Runner  Judo Black Belt Instructor
3. Foundations of Zend Framework  What is...  Uses PHP >= 5.5  Open Source  On GitHub  Diverse Install  Pyrus, Composer, Git Submodules  Built on MVC design pattern  Can be used as components or entire framework
4. Foundations of Zend Framework  Skeleton Application  Git clone Zendframework Skeleton Application  Github /zendframework/ZendSkeletonApplication
5. Foundations of Zend Framework  Composer  Install Zend Framework 2  php composer.phar install  Creates and/or populates '/vendor' directory  Clones Zend Framework 2  Sets up Composer autoloader (PSR-0)  composer create-project zendframework/skeleton- application
6. Foundations of Zend Framework  Structure
7. Foundations of Zend Framework  Zend Framework 2 Usage  NO MAGIC!!!  Configuration driven  No forced structure  Uses namespaces
8. Foundations of Zend Framework  MVC  Very briefly
9. Foundations of Zend Framework  Typical Application Flow - Load  index.php  Loads autoloader (PSR-0 = default)  init Application using application.config.php
10. Foundations of Zend Framework  Typical Application Flow – App Config  application.config.php  Loads modules one at a time  (Module.php = convention)  Specifies where to find modules  Loads configs in autoload directory (DB settings, etc.)
11. Foundations of Zend Framework  Typical Application Flow – Modules  Module.php (convention)  Makes MvcEvent accessible via onBootstrap()  Giving further access to Application, Event Manager, and Service Manager.  Loads module.config.php  Specifies autoloader and location of files.  May define services and wire event listeners as needed.
12. Foundations of Zend Framework  Typical Application Flow – Module Config  module.config.php  Containers are component specific  Routes  Navigation  Service Manager  Translator  Controllers  View Manager  Steer clear of Closures (Anonymous Functions)  Do not cache well within array.  Less performant (parsed and compiled on every req) as a factory only parsed when service is used.
13. Foundations of Zend Framework  Routes
14. Foundations of Zend Framework  Routes  Carries how controller maps to request  Types:  Hostname – 'me.adamculp.com'  Literal - '/home'  Method – 'post,put'  Part – creates a tree of possible routes  Regex – use regex to match url '/blog/?<id>[0-9]?'  Scheme – 'https'  Segment - '/:controller[/:action][/]'  Query – specify and capture query string params
15. Foundations of Zend Framework  Route Example /module/Application/config/module.config.php
16. Foundations of Zend Framework  Event Manager
17. Foundations of Zend Framework  Event Manager  Many Event Managers  Each is isolated  Events are actions  Many custom we create  Defaults (following slide)
18. Foundations of Zend Framework  Diagram of MVC Events
19. Foundations of Zend Framework  Event Manager Example /module/Application/Module.php
20. Foundations of Zend Framework  Shared Event Manager  There is only one!  Similar to Event Manager  Obtain from Event Manager  Allows other lower level Event Managers to communicate with each other.  Globally available  Why?  May want to attach to objects not yet created, such as attaching to all controllers.
21. Foundations of Zend Framework  Shared Event Manager Example /module/Application/Module.php
22. Foundations of Zend Framework  Event Manager Characteristics  An Object  Attach Triggers to Events  Listeners are callbacks when Trigger satisfied  Function or Anon Function (action)  Queues by priority (last parameter in call)  Patterns  Pub/Sub  Class that triggers the event is publisher  Listener is subscribing to the event  Observer - (Subject/Observer)  Listener is the observer  Class Triggering the event is the subject
23. Foundations of Zend Framework  Services  ALL THE THINGS!
24. Foundations of Zend Framework  Service Manager  Recommended alternative to Zend\Di  Di pure DIC, SM is factory-based container  Everything is a service, even Controllers  Can be created from:  Application configuration  Module classes  Useful if anon functions desired  Module configuration (most common)  No anon functions due to caching issues  Local override configuration  For times when vendor keys need over-written  Specified in application config
25. Foundations of Zend Framework  Defining Services  Beware key name overwritting  Use fully qualified class name when applicable  \MyApp\Controller\Product\Index  Or be descriptive  {module}-{name}  'product-category' instead of 'category'  All keys get normalized  \App\Controller\Product\Index == app-controller- product-index  Hierarchy of definitions  Module.php – initial  module.config.php over-rides Module.php  Local over-rides module.config.php
26. Foundations of Zend Framework  Service Types  Types:  Services – Explicit  key => value pairs (string, boolean, float, object)  Invokables  key => class (class/object with no needed dependencies)  Factories  key => object (class/object with needed dependencies)  Aliases (name => some other name)  Abstract Factories (unknown services)  Scoped Containers (limit what can be created)  Shared (or not; you decide)
27. Foundations of Zend Framework  Service Config Example /module/Application/config/module.config.php
28. Foundations of Zend Framework  Service Module Example /module/Application/config/module.php
29. Foundations of Zend Framework  Using Service Example /module/Application/Module.php /module/Application/view/layout/layout.phtml
30. Foundations of Zend Framework  Module Manager
31. Foundations of Zend Framework  Module Manager  Gets directives from application.config.php  Modules to load  Order is important if module depends on another  Where to find modules (convention found in)  Modules directory  Vendor directory  Loads each module  Module.php  For dynamic content/settings  module.config.php (if getConfig() in Module.php)  Over-rides Module.php  Then hand off to MvcEvent process to Bootstrap.
32. Foundations of Zend Framework  Module Basics  Related for a specific “problem”.  Logical separation of application functionality  Reusable  Removing a module doesn't kill the application  Contains everything specific to given module  Keep init() and onBootstrap() in modules light.  Do not add data to module structure.
33. Foundations of Zend Framework  Module Contents  Contents  PHP Code  MVC Functionality  Library Code  Though better in Application or via Composer  May not be related to MVC  View scripts  Public assets (images, css, javascript)  More?
34. Foundations of Zend Framework  Module Skeleton  Easy creation using Zend Skeleton Module  GitHub /zendframework/ZendSkeletonModule
35. Foundations of Zend Framework  Leveraging Middleware and PSR-7  Vi
36. Foundations of Zend Framework  Other Things Worth Investigating  Views  Forms  Databases  Navigation  View Strategies (Action or Restful) Sorry, just not enough time in a regular talk.
37. Foundations of Zend Framework  Resources  http://framework.zend.com  http://www.zend.com/en/services/training/course-catal og/zend-framework-2  http://www.zend.com/en/services/training/course-cata log/zend-framework-2-advanced  http://zendframework2.de/cheat-sheet.html  http://apigility.org
38. Foundations of Zend Framework  Thank You!  Rate this talk: https://joind.in/14923  Code: https://github.com/adamculp/foundations-zf2-talk Adam Culp http://www.geekyboy.com http://RunGeekRadio.com Twitter @adamculp