title: ob_start(): second array member is not a valid method
body: <p>I installed a web application, but while opening the web application in a browser getting message</p>
  
  <pre>
  Warning: ob_start(): second array member is not a valid method in /opt/lampp/htdocs/-/mainfile.php on line 80
  
  Notice: ob_start(): failed to create buffer in /opt/lampp/htdocs/-/mainfile.php on line 80</pre>
  
  <p>I saw the mainfile.php, the statement throwing this message is :</p>
  
  <pre>ob_start(array('ob_gzhandler',5));</pre>
  
  <p>ob_start('ob_gzhandler') is working fine but if array() is used its not working.</p>