tp5.* 使用PHPExcel

composer require phpoffice/phpexcel

use PHPExcel_IOFactory;
use PHPExcel;

    function export(){//導出Excel
        $xlsName  = "export";
        $xlsCell  = array(
            array('uid','賬號序列'),
            array('nickname','名字'),
            array('email','郵箱'),
        );
        $xlsData  = Db::name('表名')->Field('uid,nickname,email')->select();
        $this->exportExcel($xlsName,$xlsCell,$xlsData);
    }

    function exportExcel($expTitle,$expCellName,$expTableData){
        //include_once EXTEND_PATH.'PHPExcel/PHPExcel.php';//方法二
        $xlsTitle = iconv('utf-8', 'gb2312', $expTitle);//文件名稱
        $fileName = $expTitle.date('_YmdHis');//or $xlsTitle 文件名稱可根據自己情況設定
        $cellNum = count($expCellName);
        $dataNum = count($expTableData);

        $objPHPExcel = new PHPExcel();//方法一
        //$objPHPExcel = new \PHPExcel();//方法二
        $cellName = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','AA','AB','AC','AD','AE','AF','AG','AH','AI','AJ','AK','AL','AM','AN','AO','AP','AQ','AR','AS','AT','AU','AV','AW','AX','AY','AZ');

        $objPHPExcel->getActiveSheet(0)->mergeCells('A1:'.$cellName[$cellNum-1].'1');//合併單元格
        $objPHPExcel->setActiveSheetIndex(0)->setCellValue('A1', $expTitle.'  Export time:'.date('Y-m-d H:i:s'));
        for($i=0;$i<$cellNum;$i++){
            $objPHPExcel->setActiveSheetIndex(0)->setCellValue($cellName[$i].'2', $expCellName[$i][1]);
        }
        // Miscellaneous glyphs, UTF-8
        for($i=0;$i<$dataNum;$i++){
            for($j=0;$j<$cellNum;$j++){
                $objPHPExcel->getActiveSheet(0)->setCellValue($cellName[$j].($i+3), $expTableData[$i][$expCellName[$j][0]]);
            }
        }
        ob_end_clean();//這一步非常關鍵，用來清除緩衝區防止導出的excel亂碼
        header('pragma:public');
        header('Content-type:application/vnd.ms-excel;charset=utf-8;name="'.$xlsTitle.'.xls"');
        header("Content-Disposition:attachment;filename=$fileName.xls");//"xls"參考下一條備註
        $objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');//"Excel2007"生成2007版本的xlsx，"Excel5"生成2003版本的xls
        $objWriter->save('php://output');
        exit;
    }