【转载】codeigniter与php5.6的兼容问题，codeigniterphp5.6
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
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