PHP 5.2 Notice: Use of undefined constant __DIR__ - assumed '__DIR__

In php 5.3 or less it'll provide an error like the following: ``` Notice: Use of undefined constant __DIR__ - assumed '__DIR__ ``` It's because i'm using the magic constant `__DIR__`. Is there an alternative to using `__DIR__` in 5.3 or less?? Here's the code that's causing it: ``` <?php /** * Load template files * * $files Contains alphabetized list of files that will be required */ $files = array( 'elements.inc', 'form.inc', 'menu.inc', 'theme.inc', ); function _zurb_foundation_load($files) { $tp = drupal_get_path('theme', 'zurb_foundation'); $file = ''; // Workaround for magic constant; for now because of php 5.2 issue // http://drupal.org/node/1899620#comment-6988766 if( !defined( __DIR__ ) )define( __DIR__, dirname(__FILE__) ); // Check file path and '.inc' extension foreach($files as $file) { $file_path = __DIR__ .'/inc/' . $file; if ( strpos($file,'.inc') > 0 && file_exists($file_path)) { require_once($file_path); } } } _zurb_foundation_load($files); ```