title: Cannot find save handler 'redis'
body: <p>I am running a PHP 5.4 hosted Web App on Azure. To manage session handling I have configured a Redis cache instance on Azure. </p>
  
  <p>I have set the session save path &amp; handler:</p>
  
  <pre><code>session.save_handler = redis
  session.save_path = "tcp://kbcache.redis.cache.windows.net:6379?auth=***"
  </code></pre>
  
  <p>I have also configured the Redis extensions:</p>
  
  <pre><code>PHP_EXTENSIONS  bin\php_igbinary.dll
  APPSETTING_PHP_EXTENSIONS   bin\php_igbinary.dll
  PHP_EXTENSIONS02    bin\php_redis.dll
  APPSETTING_PHP_EXTENSIONS02 bin\php_redis.dll
  </code></pre>
  
  <p>However when I browse to my website I receive the message:</p>
  
  <blockquote>
    <p>Warning: session_start(): Cannot find save handler 'redis' - session
    startup failed in D:\home\site\wwwroot\index.php(22) : eval()'d code
    on line 2</p>
  </blockquote>
  
  <p>What am I missing?</p>