News Feed
Jobs Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Chris Hartjes' Blog:
Scope Is Not a Mouthwash
November 28, 2011 @ 09:50:03

Chris Hartjes has a reminder posted to his blog today in the form of this recent post that "scope is not a mouthwash" - personal experience from his recent development where he forgot about something as simple as scoping (and it caused him all sorts of headaches).

For [a chapter in my book on dependency injection] I am using Pimple, an incredibly small but effective dependency injection container. Easy to use, simple and effective documentation, just what I was looking for. I also noticed that Pimple supported the use of closures (or anonymous functions) as a way of storing a dependency. Then things got stupid.

He shares a bit of code showing how he added it to his bootstrap but was given a "cannot find class" error when he tried to use the tool. He walks through the steps he followed to track down the problem - looking closer at Pimple, investigating closures and, the ultimate problem, namespace scoping. He was missing a "" to start his namespace and closures work slightly differently:

So why does it behave differently inside closures? I am not 100% sure, but if I had to make an educated guess I would say that when trying to resolve namespaces inside a closure, the interpretor doesn't assume that it is already inside the global namespace, that it is in a namespace of it's own.
0 comments voice your opinion now!
namespace scoping pimple dependencyinjection


blog comments powered by Disqus

Similar Posts

David Coaller's Blog: Namespaces part 1.2: Namespaces

Marcelo Gornstein's Blog: Dependency injection with Xml and Yaml in the Ding container

IBM developerWorks: The future of PHP

David Coallier's Blog: PHP Namespaces (Part 2: Namespace constants)

Chris Hartjes' Blog: Scope Is Not a Mouthwash


Community Events











Don't see your event here?
Let us know!


facebook language opinion framework series release podcast security code composer hhvm package dependency introduction component application unittest hack symfony2 install

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework