title: php 5.6.13, PDO, connect to interbase fails (Debian GNU/Linux 7.7 (wheezy))
body: <p>I can connect to my interbase using IBConsole using the same user/pass as I use in php</p>
  
  <p>php --version</p>
  
  <pre><code>PHP 5.6.13-0+deb8u1 (cli) (built: Sep  7 2015 13:38:37)
  Copyright (c) 1997-2015 The PHP Group
  Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
      with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies
  </code></pre>
  
  <p>Installed interbase: <code>apt-get install libapache2-mod-php5 php5-interbase</code></p>
  
  <p>phpinfo() returns:</p>
  
  <pre><code>Firebird/InterBase Support: dynamic
  Compile-time Client Library Version: Firebird API version 25
  Run-time Client Library Version LI-V6.3.3.26778: Firebird 2.5
  PDO drivers enabled: firebird, mysql
  PDO_Firebird, PDO Driver for Firebird: enabled
  Firebird driver for PDO: Ard Biesheuvel
  </code></pre>
  
  <p>php test 1:</p>
  
  <pre><code>$host = 'MYSRV1:C:\folder\dbhms.ib';
  $username = 'dbuser';
  $password= 'dbpassword';
  $conStr = "firebird:dbname={$host};User={$username};Password={$password};Port=3050;"; 
  $DB = new PDO($conStr);
  result:
  PHP Fatal error:  Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [335544472] Your user name and password are not defined. Ask your database administrator to set up a Firebird login.' in /home/tr/ibase/test.php:29
  </code></pre>
  
  <p>php test 2:</p>
  
  <pre><code>print_r(PDO::getAvailableDrivers());
  result:
  ;Array
  (
      [0] =&gt; firebird
      [1] =&gt; mysql
  )
  </code></pre>
  
  <p>Php documentation for PDO::getAvailableDrivers on <a href="http://php.net/manual/en/pdo.getavailabledrivers.php" rel="nofollow">http://php.net/manual/en/pdo.getavailabledrivers.php</a>:</p>
  
  <pre><code>print_r(PDO::getAvailableDrivers());
  result:
  Array
  (
      [0] =&gt; mysql
      [1] =&gt; sqlite
  )
  </code></pre>
  
  <p>I notice that there is a leading ';' in my test 2 (;Array ) but it should not cause any trouble</p>
  
  <p>What am I missing?</p>