Creating an Instance of a PHP Class


This works in PHP 5.3+:

$CLASS_NAME = 'TheName';

$class_instance = new $CLASS_NAME;

This doesn’t

define('CLASS_NAME', 'TheName');

$class_instance = new CLASS_NAME;



Use the way that works.  There are other limitations with using a variable to create a class.  Another way to create a class from a variable is by using:

$test = call_user_func(array($className, 'getInstance'));


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