title: Codeigniter: Message: Cannot modify header information - headers already sent by (output started at
body: <p>I have created a dynamic menu CMS website. I developed in a Windows system. When i run my project in windows operating system, My project runs without any error. But now uploaded it into Linux Operating system server i am getting warning &amp; error like:</p>
  
  <pre><code>    A PHP Error was encountered
  
      Severity: Warning
  
      Message: Cannot modify header information - headers already sent by (output started at /home/ansofcm8/public_html/apps/resources/math/application/core/MY_Controller.php:1)
  
      Filename: libraries/Session.php
  
      Line Number: 675
  </code></pre>
  
  <p>What could be the reason. Please help me.</p>