phpExcel extension library for php excel file export

/**
     * 导出特定文件
	 * 根据具体情况而定
     */
    public function download(){

        //1. 从数据库来获取对应的二维数组
        $alist = array(...);
        $list = $alist;
        $data = array();
		//2. 设置xls的 表头名
        $headArr = array("排名","姓名","手机","获奖","参与时间");
        if(false === empty($list)){
            $i=0;
            foreach ($list as $key => $val){
                //组装对应的单元格A，B，C，D。。。
				$data[$i] = array(
                       ($i+1),            //A
                       $val['name'],      //B
                       $val['tel'],       //C
                       $val['award'],     //D
                       ...
                    );
                 $i++;
            }
        }else{
            $data[0] = array('暂无相关记录！');
        }

        $fileName = "test-excel_";
        $this->explodexls($data,$headArr,$fileName);
    }

    /**
	 * 工具函数 处理 xls 文件导出
	 * @param $data array() 对应的tbody 数据
     * @param $headArr array() 对应的thead 数据
	 * @param $fileName string  指定的导出文件名 
	 * @return xls格式 文件自动导出
     */
    public function explodexls($data,$headArr,$fileName){
		//注意这里换成对应的根目录 找到绝对路径
        $dir = __dir__.'/../../../../public';
        require_once $dir.'/excel/PHPExcel.php';
        require_once $dir.'/excel/PHPExcel/Writer/Excel2007.php';
        require_once $dir.'/excel/PHPExcel/Writer/Excel5.php';
        include_once $dir.'/excel/PHPExcel/IOFactory.php';

        if(empty($data) || !is_array($data)){
            die("data must be a array");
        }
        if(empty($fileName)){
            exit;
        }
        $date = date("Y_m_d",time());
        $fileName .= "_{$date}.xls";
        //创建新的PHPExcel对象
        $objPHPExcel = new PHPExcel();
        $objProps = $objPHPExcel->getProperties();
        //设置表头
        $key = ord("A");
        foreach($headArr as $v){
            $colum = chr($key);
            $objPHPExcel->setActiveSheetIndex(0)->setCellValue($colum.'1', $v);
            $key += 1;
        }
        $column = 2;
        $objActSheet = $objPHPExcel->getActiveSheet();
        foreach($data as $key => $rows){ //行写入
            $span = ord("A");
            foreach($rows as $keyName=>$value){// 列写入
                $j = chr($span);
                $objActSheet->setCellValue($j.$column, $value);
                $span++;
            }
            $column++;
        }
        //$fileName = iconv("utf-8", "gb2312", $fileName);
        //重命名表
        $objPHPExcel->getActiveSheet()->setTitle('Simple');
        //设置活动单指数到第一个表,所以Excel打开这是第一个表
        $objPHPExcel->setActiveSheetIndex(0);
        //将输出重定向到一个客户端web浏览器(Excel2007)
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header("Content-Disposition: attachment; filename=\"$fileName\"");
        header('Cache-Control: max-age=0');
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
        $objWriter->save('php://output'); //文件通过浏览器下载
        exit;
    }