title: Install FPDI on Ubuntu 16.04
body: <p>I just ran <code>apt-get install libfpdi-php</code> as well as installed composer and ran <code>composer require setasign/fpdi-fpdf</code>. all three operations seemed to complete swimmingly well however is still get the error when calling <code>require_once('fpdi.php');</code> in my PHP script (which is line 3, after calling <code>require_once ('fpdf.php');</code>:</p>
  
  <p><code>PHP Warning:  require_once(fpdi.php): failed to open stream: No such file or directory in /fpdfwriteon.php on line 3
  PHP Fatal error:  require_once(): Failed opening required 'fpdi.php' (include_path='.:/usr/share/php') in /fpdfwriteon.php on line 3</code></p>
  
  <p>I've searched my entire disk for "fpdi" and nothing returns. Am I missing a step? Did I do something wrong with composer?</p>
  
  <p>thanks.</p>
  
  <p>EDIT: I have a link to fpdf.php in /usr/share/php/ from when I installed fpdf but there is no indication of fpdi anywhere</p>