title: Symfony3 demo project don't work: PDO Exception Could not find driver (sqlite case)
body: <p>Recently i've created Symfony3 project by command:</p>
  
  <pre><code>symfony new myproject
  </code></pre>
  
  <p>The project uses mysql and it works fine.</p>
  
  <p>After that i've created demo project to study symfony best practices:</p>
  
  <pre><code>symfony demo
  </code></pre>
  
  <p>Project was created successfully. Config.php shows, that everything is ok. app_dev.php was successfully opened in my web browser. But when i try to open "<a href="http://localhost/app_dev.php/ru/blog/" rel="noreferrer">http://localhost/app_dev.php/ru/blog/</a>" (there is a public part of the app) 500 internal server error will appear. /app_dev.php/ru/blog/ shows:</p>
  
  <p><strong>Error message:</strong></p>
  
  <blockquote>
    <p>An exception occured in driver: could not find driver</p>
    
    <p>500 Internal Server Error - DriverException</p>
    
    <p>2 linked Exceptions:</p>
    
    <p>PDOException »</p>
    
    <p>PDOException »</p>
  </blockquote>
  
  <p><strong>Critical part in call stack:</strong></p>
  
  <blockquote>
    <p>CRITICAL - Uncaught PHP Exception Doctrine\DBAL\Exception\DriverException: "An exception occured in driver: could not find driver" at /var/www/symfony_demo/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractSQLiteDriver.php line 85</p>
  </blockquote>
  
  <p>I've read all stack exchange issues about PDO Exception, but none helps me... </p>
  
  <p>I use Ubuntu, Nginx.</p>
  
  <p>Mysql, sqlite, php5-sqlite, sqlite3, libsqlite3-dev are installed. Nginx and php5-fpm are restarted. php.ini SQLite 3.x driver for PDO Wez Furlong.</p>
  
  <p>Demo app parameters.yml:</p>
  
  <pre><code>database_driver: pdo_sqlite
  database_host: 127.0.0.1
  database_port: null
  database_name: null
  database_user: root
  database_password: null
  database_path: '%kernel.root_dir%/data/blog.sqlite'
  mailer_transport: smtp
  mailer_host: 127.0.0.1
  mailer_user: null
  mailer_password: null
  locale: en
  secret: secret_value_for_symfony_demo_application
  </code></pre>
  
  <p>php.ini file:</p>
  
  <pre><code>[sqlite]
  ; http://php.net/sqlite.assoc-case
  ;sqlite.assoc_case = 0
  
  [sqlite3]
  ;sqlite3.extension_dir =
  </code></pre>
  
  <p>I have no idea, what is the reason of the problem and how to resolve it.</p>
  
  <p>Help please!</p>