基于phpExcel写的excel类（导出为Excel）

<?php
/*
* 类的功能
* 传入二位数组导出excel 
* 传入excel 导出二位数组
* @author mrwu
*/
require('PHPExcel.php');
require_once 'PHPExcel/Reader/Excel5.php'; 
include 'PHPExcel/IOFactory.php';

class plugin_phpexcel
{
private $export_excel_title;//导出excel标题
private $export_sheet_title;//导出sheet标题
private $letters;
private $php_excel;//php_excel操作类
private $active_sheet;

function __construct($export_excel_title='excel',$export_sheet_title='sheet1')
{
$this->letters=range('A','Z',1);
$this->php_excel=new PHPExcel();
$this->php_excel->setActiveSheetIndex(0);
$this->active_sheet=$this->php_excel->getActiveSheet();
$this->export_excel_title=$export_excel_title;
$this->export_sheet_title=$export_sheet_title;
}

/*
* $title='标题' array
* $import_arr 插入excel的数组 要求二位数组
*/
function export($title=array(),$import_arr)
{
//有设置excel第一行的标题
if($title)
{
$count=count($title);
for($i=0;$i<=$count;$i++)
{
$this->active_sheet->setCellValue($this->letters[$i].'1',$title[$i]);
}
}
//循环插入二维数组
$count=count($import_arr[0]);
$row=1;
foreach($import_arr as $value)
{

$row++;
$j=0;
foreach($value as $key=>$v)
{
$this->active_sheet->setCellValue($this->letters[$j].$row,$v);
echo $value[$j];
$j++;
}
}
$phpWriter=PHPExcel_IOFactory::createWriter($this->php_excel,'Excel5');
//设置一些标题等
$file=$this->export_excel_title;
$this->active_sheet->setTitle($this->export_sheet_title);

//设置header
header("Pragma: public"); 
header("Expires: 0"); 
header("Cache-Control:must-revalidate, post-check=0, pre-check=0"); 
header("Content-Type:application/force-download"); 
header("Content-Type:application/vnd.ms-execl"); 
header("Content-Type:application/octet-stream"); 
header("Content-Type:application/download"); 
header('Content-Disposition:attachment;filename="excel.xls"'); 
header("Content-Transfer-Encoding:binary"); 

$phpWriter->save('php://output'); 


}
}
//测试
$php_excel=new plugin_phpexcel('excel','sheet1');
$php_excel->export(array('title','content'),array(array('title'=>'haha','content'=>'shit'),array('title'=>'hehe','content'=>'fuck')));