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codeigniter Message: mkdir(): Invalid path Filename: drivers/Session_files_driver.php
解决办法:
把config.php中
$config['sess_save_path'] = NULL;
改为:
$config['sess_save_path'] = FCPATH.'public/sess_save_path';
//在根目录下新建public/sess_save_path,并给写文件权限
创建一个存放session的目录