News Feed
Sections




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

Brandon Savage's Blog:
A Lesson In Static Methods And Late Static Binding
April 12, 2010 @ 11:10:51

Brandon Savage in his frustrations with the Zend Framework and the "self" keyword in PHP has written up a new post showing how you can use late static binding to work around it.

he problem is, when extended, My_Auth::getInstance() still returns an instance of Zend_Auth. The solution was to duplicate the static method in my My_Auth class, which worked properly. What did I get as a return value? Zend_Auth [...] Why didn't I get an instance of My_Auth instead of Zend_Auth? Well, that's because PHP determines the meaning of the self keyword at compile time, meaning that when you call a function that makes use of it later, you'll get whatever it's been defined to mean when it was compiled.

To remedy the situation he uses late static binding (in PHP 5.3+) by using the "static" keyword like you would use "self" to refer correctly to the current class, not the class it sees at runtime.

0 comments voice your opinion now!
static method latestaticbinding lsb method


blog comments powered by Disqus

Similar Posts

Arnold Daniels' Blog: An alternative way of EAV modeling

Gustav Eklundh' sBlog: Search Methods in PHP

DevShed: Working Out of the Object Context to Build Loader Apps in PHP

Mike Lively's Blog: Late Static Binding (LSB) forward_static_call()

Matthew Weier O'Phinney's Blog: Proxies in PHP


Community Events

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


interview community opinion introduction release extension series framework performance library podcast version php7 conference application example laravel symfony2 voicesoftheelephpant api

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