News Feed
Sections




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

DZone.com:
Reuse your closures with functors
December 29, 2010 @ 10:50:19

On DZone.com there's a new tutorial from Giorgio Sironi about reusing closures with the help of functors (a special kind of object instancing done in PHP with the help of __invoke).

I like PHP closures and their superset, anomyous functions, as they implement the Command pattern very well when used correctly. However I feel that sometimes they are: difficult to reuse and difficult to force contracts on. [...] What if we wanted instead, a closure which we can instance even more than one time (maybe with different variables), and that we could type hint?

He shows how to make this possible with a functor created using the __invoke magic method of PHP to handle the request to an object like a function. He includes some sample code to show it in action - a basic callback (SquareCallback) and how it compares to calling a normal closure. It also shows something a bit more technical, an "AdderCallback" class that can be defined as a type hint on a function.

0 comments voice your opinion now!
closure functor invoke snippet example callback typehint


blog comments powered by Disqus

Similar Posts

YoungCoders.com: The PHP Construct You've Never Used

Evert Pot: PHP's callable typehint too loose?

PHPImpact Blog: Zend Framework: The Cost of Flexibility is Complexity

DevArticles: Learning AJAX

Kevin Schroeder's Blog: A little more advanced ZF2 EventManager usage


Community Events

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


symfony example composer introduction laravel opinion community php7 programming podcast series interview framework language part2 yii2 application list project api

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework