Use PHPExcel in CI to export data to Excel

class Table_export extends CI_Controller {
function __construct()
{
parent::__construct();
// Here you should add some sort of user validation
// to prevent strangers from pulling your table data
}
function index($table_name)
{
$this->load->database();
$query = $this->db->query("select * from `$table_name` WHERE del= 1");
// $query = mb_convert_encoding("gb2312", "UTF-8", $query);
if(!$query)
return false;
// Starting the PHPExcel library
$this->load->library('PHPExcel');
$this->load->library('PHPExcel/IOFactory');
$objPHPExcel = new PHPExcel();
$objPHPExcel->getProperties()->setTitle("export")->setDescription("none");
$objPHPExcel->setActiveSheetIndex(0)
->setCellValue('A1', iconv('gbk', 'utf-8', '中文Hello'))
->setCellValue('B2', 'world!')
->setCellValue('C1', 'Hello');
// Field names in the first row
$fields = $query->list_fields();
$col = 0;
foreach ($fields as $field)
{
$objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, 1, $field);
$col++;
}
// Fetching the table data
$row = 2;
foreach($query->result() as $data)
{
$col = 0;
foreach ($fields as $field)
{
$objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $data->$field);
$col++;
}
$row++;
}
$objPHPExcel->setActiveSheetIndex(0);
$objWriter = IOFactory::createWriter($objPHPExcel, 'Excel5');
//发送标题强制用户下载文件
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="Products_'.date('dMy').'.xls"');
header('Cache-Control: max-age=0');
$objWriter->save('php://output');
}
}
?>

加入数据库有表名为products，然后访问http://www.yourwebsite.com/table_export/index/products 就可以导出excel文件了。