News Feed
Sections




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

Cormac's Blog:
Read-only object variables in php using magic methods
January 23, 2009 @ 12:09:51

This new post on Cormac's blog shows a little trick you can use to make "read-only" object variables with the help of the handy magic methods built in to PHP5.

You can create read-only object variables by using the "private" keyword and the __get() and __set() magic methods. [...] So now classWithReadOnlyVar::readOnlyVar is only settable from inside the class, but you can read it from anywhere.

His example code initially sets up the read-only variable as a property of the example class. The __get magic method is called to correctly fetch the value but the __set intercepts anything trying to change its value. This same sort of thing can be accomplished with the protected/private keywords in PHP5.

1 comment voice your opinion now!
readonly object variable magic method example


blog comments powered by Disqus

Similar Posts

SplitBrain.org: Presentations in DokuWiki

Jani Hartikainen's Blog: Unit testing 4: Mock objects and testing code which uses the database

Professioanl PHP Blog: Building a culture of objects in PHP

DevShed: Design Patterns and PHP 5

PHP 10.0 Blog: php -T (variable tainting)


Community Events





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


laravel security composer opinion install package library version framework introduction podcast voicesoftheelephpant community tool update symfony series interview release language

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