Excel导出，支持副标题

<?php

/**
 * Excel 助手
 * sudo composer require phpoffice/phpspreadsheet
 */

namespace CommonUtil;

use PhpOfficePhpSpreadsheetSpreadsheet;
use PhpOfficePhpSpreadsheetWriterXlsx;
use PhpOfficePhpSpreadsheetStyleAlignment;
use PhpOfficePhpSpreadsheetStyleColor;

class ExcelUtil extends CommonUtil
{
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * 导出数据
     */
    public function exportExcel($expTitle, $expCellName, $expTableData, $subTitle)
    {
        $fileName = $expTitle;
        $spreadsheet = new Spreadsheet();
        // 获取活动的工作空间
        $worksheet = $spreadsheet->getActiveSheet();
        $cellNum = count($expCellName);
        $dataNum = count($expTableData);
        $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');

        // 合并单元格
        $worksheet->mergeCells('A1:' . $cellName[$cellNum - 1] . '1');
        // 设置第一格的内容
        $worksheet->setCellValue('A1', $expTitle);
        // 设置加粗
        $worksheet->getStyle('A1')->getFont()->setBold(true);
        // 设置居中
        $styleArray = [
            'alignment' => [
                'horizontal' => Alignment::HORIZONTAL_CENTER,
            ],
        ];
        $worksheet->getStyle('A1')->applyFromArray($styleArray);
        // 设置颜色
        $worksheet->getStyle('A1')->getFont()->getColor()->setARGB(Color::COLOR_DARKRED);

        // 设置标题
        $worksheet->setTitle($expTitle);

        if ($subTitle) {
            // 合并单元格
            $worksheet->mergeCells('A2:' . $cellName[$cellNum - 1] . '2');
            // 设置第一格的内容
            $worksheet->setCellValue('A2', $subTitle);
            // 设置居中
            $styleArray = [
                'alignment' => [
                    'horizontal' => Alignment::HORIZONTAL_CENTER,
                ],
            ];
            $worksheet->getStyle('A2')->applyFromArray($styleArray);
            // 设置颜色
            $worksheet->getStyle('A2')->getFont()->getColor()->setARGB(Color::COLOR_DARKGREEN);

            // 设置表格菜单
            for ($i = 0; $i < $cellNum; $i++) {
                $worksheet->setCellValue($cellName[$i] . (+3), $expCellName[$i][1]);
                $worksheet->getStyle($cellName[$i] . (+3))->getFont()->setBold(true);
                // 自动宽度
                $worksheet->getColumnDimension($cellName[$i])->setAutoSize(true);
            }

            // 设置表格内容
            for ($i = 0; $i < $dataNum; $i++) {
                for ($j = 0; $j < $cellNum; $j++) {
                    $worksheet->setCellValue($cellName[$j] . ($i + 4), $expTableData[$i][$expCellName[$j][0]]);
                    // 支持换行
                    if ($expCellName[$j][2] == 1) {
                        $worksheet->getStyle($cellName[$j] . ($i + 4))->getAlignment()->setWrapText(true);
                    }
                }
            }
        } else {
            // 设置表格菜单
            for ($i = 0; $i < $cellNum; $i++) {
                $worksheet->setCellValue($cellName[$i] . (+2), $expCellName[$i][1]);
                $worksheet->getStyle($cellName[$i] . (+2))->getFont()->setBold(true);
                // 自动宽度
                $worksheet->getColumnDimension($cellName[$i])->setAutoSize(true);
            }

            // 设置表格内容
            for ($i = 0; $i < $dataNum; $i++) {
                for ($j = 0; $j < $cellNum; $j++) {
                    $worksheet->setCellValue($cellName[$j] . ($i + 3), $expTableData[$i][$expCellName[$j][0]]);
                    // 支持换行
                    if ($expCellName[$j][2] == 1) {
                        $worksheet->getStyle($cellName[$j] . ($i + 3))->getAlignment()->setWrapText(true);
                    }
                }
            }
        }



        // 设置列宽为自动
        // $spreadsheet->getActiveSheet()->getDefaultColumnDimension()->setWidth(20);
        // $worksheet->getDefaultColumnDimension()->setAutoSize(true);

        // 设置行高
        $worksheet->getDefaultRowDimension()->setRowHeight(20);

        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'); //告诉浏览器输出07Excel文件
        //header('Content-Type:application/vnd.ms-excel');//告诉浏览器将要输出Excel03版本文件
        header('Content-Disposition: attachment;filename="' . $fileName . '.xlsx"'); //告诉浏览器输出浏览器名称
        header('Cache-Control: max-age=0'); //禁止缓存
        $writer = new Xlsx($spreadsheet);
        $writer->save('php://output');
    }
}

使用

/**
 * 导出数据
 */
public function export_data() {
    $id = $_GET['survey_id'];
    $survey = M('survey');
    $survey_info = $survey->where(array('id' => $id))->find();

    if (!$survey_info) {
        $this->error('参数错误', 'index');
    }

    // 获取题目
    $survey_question      = M('survey_question');
    $survey_question_item = M('survey_question_item');
    $survey_answer        = M('survey_answer');
    $survey_question_list = $survey_question->where(['survey_id'=>$id,'deleted'=>0])->order('weight desc,id asc')->select();
    foreach($survey_question_list as $k => &$v) {
        $v['subject'] = ($k+1).'、'.$v['subject'];
        if ($v['type'] == 1) {
            $v['type_str'] = '单选';
            // 获取选项和各选项答题数量
            $item_list = $survey_question_item->where(['question_id'=>$v['id'],'deleted'=>0])->select();
            foreach($item_list as $ik => &$iv) {
                $count = $survey_answer->where(['question_id'=>$v['id'],'answer'=>['like','%,'.$iv['id'].',%']])->count();
                if ($ik+1 == count($item_list)) {
                    $v['result'] .= $iv['option']."【".$count."个回答】";
                } else {
                    $v['result'] .= $iv['option']."【".$count."个回答】
";
                } 
            }
        }
        if ($v['type'] == 2) {
            $v['type_str'] = '多选';
            // 获取选项和各选项答题数量
            $item_list = $survey_question_item->where(['question_id'=>$v['id'],'deleted'=>0])->select();
            foreach($item_list as $ik => &$iv) {
                $count = $survey_answer->where(['question_id'=>$v['id'],'answer'=>['like','%,'.$iv['id'].',%']])->count();
                if ($ik+1 == count($item_list)) {
                    $v['result'] .= $iv['option']."【".$count."个回答】";
                } else {
                    $v['result'] .= $iv['option']."【".$count."个回答】
";
                } 
            }
        }
        if ($v['type'] == 3) {
            $v['type_str'] = '问答';
            // 获取回答结果
            $answer_list = $survey_answer->where(['question_id'=>$v['id'],'deleted'=>0])->select();
            foreach($answer_list as $ak => &$av) {
                if ($ak+1 == count($answer_list)) {
                    $v['result'] .= "回答".($ak+1)."【".$av['answer']."】";
                } else {
                    $v['result'] .= "回答".($ak+1)."【".$av['answer']."】
";
                } 
            }
            
        }
    }

    $survey_company = M('survey_company');
    $survey_company_list = $survey_company->where(['survey_id' => $id, 'deleted' => 0])->select();
    $company_count = count($survey_company_list);
    $sub_count = 0;
    foreach ($survey_company_list as $sv) {
        if ($sv['is_sub']) {
            $sub_count++;
        }
    }
    $company_sub_count = $sub_count;

    $subTitle = '本次分配了'.$company_count.'个企业，提交了'.$company_sub_count.'个企业';

    $xlsCell  = array(
        array('subject', '题目名称'),
        array('type_str', '题目类型'),
        array('result', '答题结果'),
    );

    $xlsName = '调查问卷《'.$survey_info['title'].'》统计结果';
    $excelUtil = new ExcelUtil();
    $excelUtil->exportExcel($xlsName, $xlsCell, $survey_question_list,$subTitle);
}