title: Open file from a different folder in PHP
body: <p>Let’s say I have two folders in my PHP server root directory: <code>x</code> and <code>y</code>. There are two more directories inside the <code>x</code> folder: <code>a</code> and <code>b</code>. In the <code>/x/a</code> directory I have the <code>index.php</code> file and in the <code>/y</code> folder a <code>stuff.php</code> file.<br>
  From my <code>/x/a/index.php</code> file, I want to include the <code>/y/stuff.php</code> file. How do I do that?<br>
  My server doesn’t allow including files from other domains, so adding the full URL doesn’t work! 
  Also, I’d like to know how to start a path from the root in PHP. I use <code>./blabla</code> from the index of my root and <code>../blabla</code> from directories in the root, but, unfortunately, <code>.../blabla</code> doesn’t work from 2nd grade directories.</p>