Codeigniter+PHPExcel中导出数据到Excel文件

1. 准备工作

下载PHPExcel：http://phpexcel.codeplex.com

这是个强大的Excel库，这里只演示导出Excel文件的功能，其中的大部分功能可能都用不着。

2. 安装PHPExcel到Codeigniter

1） 解压压缩包里的Classes文件夹中的内容到application\libraries\目录下，目录结构如下：

-- application\libraries\PHPExcel.php

-- application\libraries\PHPExcel (文件夹)

2）修改application\libraries\PHPExcel\IOFactory.php 文件

-- 将其类名从PHPExcel_IOFactory改为IOFactory，遵从CI类命名规则。

-- 将其构造函数改为public

3. 安装完毕，写一个导出excel的控制器（Controller）

代码如下：

<?php

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)
{
$query = $this->db->get($table_name);

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);

// 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');

// Sending headers to force the user to download the file
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');
}

}

4. 测试

加入数据库有表名为products，此时可以访问http://www.yoursite.com/table_export/index/products 导出Excel文件了。

参考：http://www.dannyherran.com/2011/03/exporting-your-mysql-table-data-with-phpexcel-codeigniter/