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：

 1 <?php 
 2 
 3 class Table_export extends CI_Controller {
 4  
 5     function __construct()
 6     {
 7         parent::__construct();
 8  
 9         // Here you should add some sort of user validation
10         // to prevent strangers from pulling your table data
11     }
12  
13     function index($table_name)
14     {
15         $query = $this->db->get($table_name);
16  
17         if(!$query)
18             return false;
19  
20         // Starting the PHPExcel library
21         $this->load->library('PHPExcel');
22         $this->load->library('PHPExcel/IOFactory');
23  
24         $objPHPExcel = new PHPExcel();
25         $objPHPExcel->getProperties()->setTitle("export")->setDescription("none");
26  
27         $objPHPExcel->setActiveSheetIndex(0);
28  
29         // Field names in the first row
30         $fields = $query->list_fields();
31         $col = 0;
32         foreach ($fields as $field)
33         {
34             $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, 1, $field);
35             $col++;
36         }
37  
38         // Fetching the table data
39         $row = 2;
40         foreach($query->result() as $data)
41         {
42             $col = 0;
43             foreach ($fields as $field)
44             {
45                 $objPHPExcel->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $data->$field);
46                 $col++;
47             }
48  
49             $row++;
50         }
51  
52         $objPHPExcel->setActiveSheetIndex(0);
53  
54         $objWriter = IOFactory::createWriter($objPHPExcel, 'Excel5');
55  
56         // Sending headers to force the user to download the file
57         header('Content-Type: application/vnd.ms-excel');
58         header('Content-Disposition: attachment;filename="Products_'.date('dMy').'.xls"');
59         header('Cache-Control: max-age=0');
60  
61         $objWriter->save('php://output');
62     }
63  
64 }

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/