codeigniter Message: mkdir(): Invalid path  Filename: drivers/Session_files_driver.php

原因不明,解决办法:

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$config['sess_save_path'] = NULL;

改为

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$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

自动加载session报错:

解决办法:

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$this->load->library('encryption');

$key = bin2hex($this->encryption->create_key(16));

echo $key;

生成key,$config['encryption_key'] = 'aab3162f9de3bdd00f7dd52662fed21d';

http://my.oschina.net/rain21/blog/505771