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

Ralph Schinlder's Blog: PHPundamentals Series: A Background on Statics (Part 1 on Statics)

DevShed: Generating Outputs from MySQL with Static Members and Methods in PHP 5

Gonzalo Ayuso's Blog: Strange behavior in PHP with method visibility

Sharon Levy's Blog: PHP Version

Sebastian Bergmann's Blog: The Cost of Test Isolation - Follow-Up


Community Events





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


release symfony list artisanfiles interview library podcast tool introduction laravel version language framework conference voicesoftheelephpant security community opinion series composer

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