After the server PHP upgrade I am getting the following error with PHP Version 5.6.2 on Apache 2.0
A PHP Error was encountered
Severity: Notice
Message: Only variable references should be returned by reference
Filename: core/Common.php
Line Number: 257
then i changed core/Common.php
return $_config[0] =& $config
into
$_config[0] =& $config; return $_config[0];
This resulted too many redirects for a site,and got 302 error
in core/Common.php
add this line on line no 257
return $_config[0];
i have try it its working for me when i upgraded my codeigniter version