codeigniter ci cache缓存子目录设置

@author: wide288
@date 2013-12-23
// $this->db->cachedir = $this->db->cachedir.$country.'\\';
// win 目录
$this->db->cachedir = $this->db->cachedir.$country.'/';
// linux 目录
if( file_exists($this->db->cachedir)) {
//判断是否存在
}else{
	mkdir($this->db->cachedir, 0777);
// 创建全权限目录
}
$this->db->cache_set_path($this->db->cachedir);
// 设置缓存目录
echo $this->db->cachedir;

$this->db->cache_on();
$this->db->cache_off();