错误提示：
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];
以上内容转载自丸迷人的博客 http://blog.sina.com.cn/s/blog_6718a8f40102vz05.html
原文：http://www.cnblogs.com/corvoh/p/4649357.html