title: How to uniquely identify a computer?
body: <p>Is there any way to 'grab' some personalized ID, INFO, NAME, NUMBER, DATA, etc.?</p>
  
  <p>Anything just to differentiate and recognize two or more PC on the same IP: something like the Computer name of the user besides <code>$_SESSION</code>?</p>
  
  <p>None of these work:</p>
  
  <pre><code>$hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
  php_uname('n');
  php_uname();
  </code></pre>