title: Php is unable to load pdo_mysql
body: <p>I currently develop a website using Symfony3. 
  I want to run command :</p>
  
  <pre><code>php bin/console doctrine:database:create
  </code></pre>
  
  <p>Unfortunately, I get this php warning :</p>
  
  <pre><code>PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php/20151012/pdo_mysql.so' - /usr/lib/php/20151012/pdo_mysql.so: undefined symbol: pdo_parse_params in Unknown on line 0
  </code></pre>
  
  <p>System : Ubuntu 16.04    </p>
  
  <p>php version :</p>
  
  <pre><code>PHP 7.0.8-0ubuntu0.16.04.3 (cli) ( NTS )
  Copyright (c) 1997-2016 The PHP Group
  Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
  </code></pre>