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What is the correct way to get the document root installed by Drupal?

Inside the Drupal module, I need to get the base path where the Drupal website is installed.

For example, if the drupal site is installed on: www.example.com/mysite/ then I want to get '/ Var / WWW / myseite

If it is installed at: www.example.com/ then I want to '/ Var / WWW

What is the correct way for Drupal to get this? I want to avoid PHP server variables since I read that they are unreliable.

(Drupal 6 and Drupal 7)

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php drupal drupal-7 drupal-6
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5 answers

Drupal 7 has a new constant called DRUPAL_ROOT that you can use to do this.

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To get the full root of a file system document, I use:

$_SERVER['DOCUMENT_ROOT'] . base_path()

On a Linux server, you will get something like:

 /var/www/html/www.example.com/mysite/

If you use only "base_path ()", you will only get:

 /mysite/

Same thing on Drupal 6 and 7.

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Addition to Scott Reinen's answer:

In the page.tpl.php template, it is also available in the $base_path variable.

In many cases, you don’t even need to know the base path, because the Drupal API functions add it themselves. For example, to print a link, you can do this:

 <?php print '<a href="' . base_path() . 'foo/bar">Foo Bar</a>'; ?>

But the “Drupal way” for this is to use the l () function:

 <?php print l('Foo Bar', 'foo/bar'); ?>

The l () function will automatically add the base path to href.

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base_path () does this in both D6 and D7.

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You can use the constant DRUPAL_ROOT for this.

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