title: Can I get the path of the PHP file originally called within an included file?
body: <p>Let's say we have <code>index.php</code> and it is stored in <code>/home/user/public/www</code> and <code>index.php</code> calls the class <code>Foo-&gt;bar()</code> from the file <code>inc/app/Foo.class.php</code>. </p>
  
  <p>I'd like the bar function in the <code>Foo</code> class to get a hold of the path <code>/home/user/public/www</code> in this instance — I don't want to use a global variable, pass a variable, etc.</p>