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/