How require_once in joomla2.5

问题

I Have a problem about require_once in joomla.

In this file php:

components\com_test\views\__test_r5\tmpl\default.php

I want to include some file using this code:

require_once (JPATH_ROOT.DS.'/includes/General.php');

but require_once does not works

回答1:

The path you are trying to include will evaluate to something like: joomla//includes/General.php. Notice the double slashes before "includes". The constant DS is defined to be a directory separator.

Try:
require_once (JPATH_ROOT.'/includes/General.php');
 (without DS)

回答2:

Try This :

require_once(JPATH_SITE.DS."includes/General.php");

The JPATH_SITE will return your physical path upto : installation folder.

also JURI::root() will return your site url

回答3:

The best way to do this is to use @Fnatte variant.

Also have a look at the Joomla! constants definitions and adapt where needed.

来源：https://stackoverflow.com/questions/13219043/how-require-once-in-joomla2-5