php5.6 CI的问题(Only variable references should be returned by reference)

[转载]

A PHP Error was encountered

Severity: Notice

Message: Only variable references should be returned by reference

Filename: core/Common.php

Line Number: 257

原代码：

return $_config[0] =& $config;

修改后:

$_config[0] =& $config;

return $_config[0];