当系统开启safe_mode和 open_basedir,在程序中使用以下语句
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
并且遇到301,302状态吗时会出现错误

[11-Oct-2010 14:17:41] PHP Warning: curl_setopt(): CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set in msn.class.php on line 819

解决方法是在curl语句不使用curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true),或者改为0，在php函数中自定义一个函数

curl_redir_exec函数
curl_redir_exec

curl_redir_exec($ch)替换curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true)语句

参考:

http://spoint.babyshoot.cn/archives/2009/11/curlopt-php.html

http://www.php.net/manual/en/function.curl-setopt.php

curl_setopt(): CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set in