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Why do most of the Joomla! PHP files start with "defined(' JEXEC')...?

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Revision as of 19:10, 2 September 2008 by Dextercowley (Talk | contribs)

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Most PHP files within Joomla! 1.5 begin with the following statement:

    defined('_JEXEC') or die('Restricted access');

This statement checks to see if the file is being called from within a Joomla! session. This protects your site by making it more difficult for a cracker/hacker to damage your site.

However, this line should NOT be included in your main index.php file, since this is the program that starts the Joomla! session.