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
How can I fix this?
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Edit filename: core/Common.php, line number: 257
return $_config =& $config;
$_config =& $config; return $_config;
Added by NikiC
In PHP assignment expressions always return the assigned value. So $_config =& $config returns $config - but not the variable itself, but a copy of its value. And returning a reference to a temporary value wouldn't be particularly useful (changing it wouldn't do anything).
This fix has been merged into CI 2.2.1 (https://github.com/bcit-ci/CodeIgniter/commit/69b02d0f0bc46e914bed1604cfbd9bf74286b2e3). It's better to upgrade rather than modifying core framework files.