PHP get website root absolute URL in server?

Question

I rely heavily in `$_SERVER["DOCUMENT_ROOT"]` to get absolute paths. However this doesn't work for sites which URLs don't point to the root. I have sites stored in folders such as: - site1 - site2 all directly inside the root. Is there a way to get the path in the server where the current site root is? It should return: ``` /var/chroot/home/content/02/6945202/html/site1 // If the site is stored in folder 'site1' /var/chroot/home/content/02/6945202/html // If the site is stored in the root ```

Accepted Answer

You can simply append `dirname($_SERVER['SCRIPT_NAME'])` to `$_SERVER['DOCUMENT_ROOT']`.

Update

The website seems to be directory "mounted" on that folder, so `SCRIPT_NAME` will obviously be `/`.

So, to make this work you have to use either `__DIR__` or `dirname(__FILE__)` to find out where your script is located in the file system.

Update 2

There's no single `index.php` controller for the whole site, so that won't work either.

The following expression does a string "subtraction" to find the common path. You have a known prefix (document root), an unknown (the root folder) and a known suffix (the script path), so to find the first two, you take the full absolute path (`__FILE__`) and subtract the known suffix:

```
substr(__FILE__, 0, -strlen($_SERVER['SCRIPT_NAME']));
```

If included files need this value, you must store this in a constant first before including the dependent scripts. .

PHP get website root absolute URL in server?

Solution

Problem