Document Root PHP

Just to confirm, is using:

$_SERVER["DOCUMENT_ROOT"]

the same as using: /

in HTML.

Eg. If current document is:

folder/folder/folder/index.php

I could use (in HTML) to start at the roort:

/somedoc.html

and to do the same in PHP I would have to use:

$_SERVER["DOCUMENT_ROOT"] . "/somedoc.html";

Is that correct? Is there an easier way to do it?

Solution

<a href="<?php echo $_SERVER['DOCUMENT_ROOT'].'/hello.html'; ?>">go with php</a>
    <br />
<a href="/hello.html">go to with html</a>

Try this yourself and find that they are not exactly the same.

$_SERVER['DOCUMENT_ROOT'] renders an actual file path (on my computer running as it's own server, C:/wamp/www/

HTML's / renders the root of the server url, in my case, localhost/

But C:/wamp/www/hello.html and localhost/hello.html are in fact the same file