title: Memcached installed but class not found
body: <p>If I run phpinfo() it tells me that <a href="http://www.php.net/manual/en/book.memcached.php" rel="noreferrer">memcached</a> is installed. </p>
  
  <pre><code>memcached
  memcached support   enabled
  Version     1.0.2
  libmemcached version    0.44
  Session support     yes
  igbinary support    no 
  </code></pre>
  
  <p>I installed it with <code>sudo pecl install memcached</code></p>
  
  <p>But when I try to instantiate the memcached class it is not found: </p>
  
  <p>$mc = new Memcached();</p>
  
  <p>gets:</p>
  
  <p>Fatal error: Class 'Memcached' not found </p>
  
  <p>Never used PECL as an install mechanism before, do I need to do something extra in php.ini or somewhere to be able to use the class?</p>