CI框架不借助phpexcel導出Excel，

1.下載

https://github.com/JOakley77/CI-Excel-Generation-Library

2.解壓，並複製 Excel.php， 找到項目的  libraries 文件夾粘貼，不是  sysm\libraries這個文件夾，若是沒有就新建一個，

3.具體操做

引用類庫

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

處理要導出數據

$array = array();
                $titles = array(
                    iconv("UTF-8", "GBK", '登陸時間'),
                    iconv("UTF-8", "GBK", '登陸IP'),
                    );

                foreach ($logs as $logsKey => $logsVal){
                    $array[] = array(
                        iconv("UTF-8", "GBK", date('Y-m-d',$logsVal['time'])),
                        iconv("UTF-8", "GBK", $logsVal['IP']),
                        );
                }

輸出（下載導出數據）

$this->excel->make_from_array($titles, $array);

本身瞎折騰

自定義導出文件名稱

$this->excel->filename = '-登錄日誌-'.date('Y-m-d');