title: phpexcel in zend framework 2 Fatal error: Class 'PHPExcel_IOFactory' not found
body: <p>I need to import data from an excel sheet and integrate PHPExcel in Zend framework 2. </p>
  
  <p>I place the PHPExcel in vendor. Also I came to know after google that PHPExcel has no namespace so we can use the class as root class like <code>\PHPExcel_IOFactory</code></p>
  
  <p>But I am getting the following error:</p>
  
  <pre><code>Fatal error: Class 'PHPExcel_IOFactory' not found
  </code></pre>
  
  <p>Please help!</p>