Detailed explanation of PHP using xlswriter to optimize Excel export performance (with code examples)

https://github.com/viest/php-ext-xlswriter

https://xlswriter-docs.viest.me/zh-cn/an-zhuang/huan-jing-yao-qiu

composer require viest/php-ext-xlswriter-ide-helper:dev-master

docker exec -it php72-fpm bashcd /usr/local/bin
pecl install xlswriter
docker-php-ext-enable xlswriter
php -m

php --ri xlswriter
Version => 1.3.6

docker restart php72-fpm

private function rankPersonExport($activityInfo, $list){
    $date = date('Y-m-d');
    $filename = "{$activityInfo['orgname']}-{$activityInfo['name']}-个人排行榜-{$date}";
    $header = ['名次', '用户ID', '对接账号', '姓名', '电话', '部门ID', '一级部门', '二级部门', '三级部门', '总积分', '最后积分时间', "毫秒"];
    if (!empty($activityInfo['ext'])) {
        $extArr = json_decode($activityInfo['ext'], true);
        foreach ($extArr as $errItem) {
            array_push($header, $errItem['name']);
        }
    }
    // list
    $listVal = [];
    foreach($list as $v){
        $temp = [
            $v['rank'],
            $v['userid'],
            $v['userName'],
            $v['nickName'],
            $v['phone'],
            $v['departid'],
            $v['topDepartName'],
            $v['secDepartName'],
            $v['thirdDepartName'],
            $v['score'],
            $v['updatetime'],
            $v['micro'],
        ];

        if (!empty($v['ext'])) {
            $extArr = explode('|', $v['ext']);
            foreach ($extArr as $k2 => $v2) {
                $errItemArr = explode('^', $v2);
                array_push($temp, $errItemArr[1]);
            }
        }
        array_push($listVal, $temp);
    }

    $re = downloadXLSX($filename, $header, $listVal);
    if($re){
        return $this->output(0, $re);
    }else{
        return $this->output(1, 'success');
    }}

function getTmpDir(): string{
    $tmp = ini_get('upload_tmp_dir');

    if ($tmp !== False && file_exists($tmp)) {
        return realpath($tmp);
    }

    return realpath(sys_get_temp_dir());}/**
 * download xlsx file
 *
 * @param string $filename
 * @param array $header
 * @param array $list
 * @return string errmsg
 */function downloadXLSX(string $filename, array $header, array $list): string{
    try {
        $config = ['path' => getTmpDir() . '/'];
        $excel  = (new \Vtiful\Kernel\Excel($config))->fileName($filename.'.xlsx', 'Sheet1');
        $fileHandle = $excel->getHandle();
        $format1    = new \Vtiful\Kernel\Format($fileHandle);
        $format2    = new \Vtiful\Kernel\Format($fileHandle);

        // title style
        $titleStyle = $format1->fontSize(16)
            ->bold()
            ->font("Calibri")
            ->align(\Vtiful\Kernel\Format::FORMAT_ALIGN_CENTER, \Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_CENTER)
            ->toResource();

        // global style
        $globalStyle = $format2->fontSize(10)
            ->font("Calibri")
            ->align(\Vtiful\Kernel\Format::FORMAT_ALIGN_CENTER, \Vtiful\Kernel\Format::FORMAT_ALIGN_VERTICAL_CENTER)
            ->border(\Vtiful\Kernel\Format::BORDER_THIN)
            ->toResource();

        $headerLen = count($header);

        // header
        array_unshift($list, $header);

        // title
        $title = array_fill(1, $headerLen - 1, '');
        $title[0] = $filename;
        array_unshift($list, $title);

        $end = strtoupper(chr(65 + $headerLen - 1));
        // column style
        $excel->setColumn("A:{$end}", 15, $globalStyle);
        // title
        $excel->MergeCells("A1:{$end}1", $filename)->setRow("A1", 25, $titleStyle);
        // 冻结前两行，列不冻结
        $excel->freezePanes(2, 0);
        // 数据
        $filePath = $excel->data($list)->output();

        header("Content-Disposition:attachment;filename={$filename}.xlsx");

        $re = copy($filePath, 'php://output');
        if ($re === false) {
            $err = 'failed to write output';
        } else {
            $err = '';
        }
        @unlink($filePath);

        return $err;
    } catch (\Vtiful\Kernel\Exception $e) {
        return $e->getMessage();
    }}