TP5使用Composer安装phpoffice/phpspreadsheet，导出Excel文件

1、composer安装：

composer require phpoffice/phpspreadsheet

2.点击导出按钮，触发控制器里面的方法 wdjzdc()

3. 在控制中引入

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

//wdjzdc数据导出
    public function wdjzdc()
    {
        $spreadsheet = new Spreadsheet();
        $worksheet = $spreadsheet->getActiveSheet();
//设置工作表标题名称
        $worksheet->setTitle('wdjz客户表');

//表头
//设置单元格内容
        $worksheet->setCellValueByColumnAndRow(1, 1, 'wdjz无毒样板客户表');
        $worksheet->setCellValueByColumnAndRow(1, 2, 'name');
        $worksheet->setCellValueByColumnAndRow(2, 2, 'phone');
        $worksheet->setCellValueByColumnAndRow(3, 2, 'radio1');
        $worksheet->setCellValueByColumnAndRow(4, 2, 'style');
        $worksheet->setCellValueByColumnAndRow(5, 2, 'time');

//合并单元格
        $worksheet->mergeCells('A1:E1');

        $styleArray = [
            'font' => [
                'bold' => true
            ],
            'alignment' => [
                'horizontal' => \PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,
            ],
        ];
//设置单元格样式
        $worksheet->getStyle('A1')->applyFromArray($styleArray)->getFont()->setSize(28);

        $worksheet->getStyle('A2:E2')->applyFromArray($styleArray)->getFont()->setSize(14);
        ;
        $jzInfo = db('wdjz')->select();
        $len = count($jzInfo);
        $j = 0;
        for ($i=0; $i < $len; $i++) {
            $j = $i + 3; //从表格第3行开始

            $worksheet->setCellValueByColumnAndRow(1, $j, $jzInfo[$i]['name']);
            $worksheet->setCellValueByColumnAndRow(2, $j, $jzInfo[$i]['phone']);
            $worksheet->setCellValueByColumnAndRow(3, $j, $jzInfo[$i]['radio1']);
            $worksheet->setCellValueByColumnAndRow(4, $j, $jzInfo[$i]['style']);
            $worksheet->setCellValueByColumnAndRow(5, $j, $jzInfo[$i]['time']);
        }

        $styleArrayBody = [
            'borders' => [
                'allBorders' => [
                    'borderStyle' => \PhpOffice\PhpSpreadsheet\Style\Border::BORDER_THIN,
                    'color' => ['argb' => '666666'],
                ],
            ],
            'alignment' => [
                'horizontal' => \PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,
            ],
        ];
        $total_jzInfo = $len + 2;
//添加所有边框/居中
        $worksheet->getStyle('A1:C'.$total_jzInfo)->applyFromArray($styleArrayBody);

        $filename = 'wdjz无毒样板客户表.xlsx';
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename="'.$filename.'"');
        header('Cache-Control: max-age=0');

        $writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xlsx');
        $writer->save('php://output');
    }

-----------------------------------摘取大神文档---------------------------------------------------------------------

1.设置表头

首先我们引入自动加载PhpSpreadsheet库，然后实例化，设置工作表标题名称为：学生成绩表，接着设置表头内容。表头分为两行，第一行是表格的名称，第二行数表格列名称。最后我们将第一行单元格进行合并，并设置表头内容样式：字体、对齐方式等。

require 'vendor/autoload.php';

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

include('conn.php'); //连接数据库

$spreadsheet = new Spreadsheet();
$worksheet = $spreadsheet->getActiveSheet();
//设置工作表标题名称
$worksheet->setTitle('学生成绩表');

//表头
//设置单元格内容
$worksheet->setCellValueByColumnAndRow(1, 1, '学生成绩表');
$worksheet->setCellValueByColumnAndRow(1, 2, '姓名');
$worksheet->setCellValueByColumnAndRow(2, 2, '语文');
$worksheet->setCellValueByColumnAndRow(3, 2, '数学');
$worksheet->setCellValueByColumnAndRow(4, 2, '外语');
$worksheet->setCellValueByColumnAndRow(5, 2, '总分');

//合并单元格
$worksheet->mergeCells('A1:E1');

$styleArray = [
    'font' => [
        'bold' => true
    ],
    'alignment' => [
        'horizontal' => \PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,
    ],
];
//设置单元格样式
$worksheet->getStyle('A1')->applyFromArray($styleArray)->getFont()->setSize(28);

$worksheet->getStyle('A2:E2')->applyFromArray($styleArray)->getFont()->setSize(14);

2.读取数据

我们连接数据库后，直接读取学生成绩表t_student，然后for循环，设置每个单元格对应的内容，计算总成绩。注意的是表格中的数据是从第3行开始，因为第1，2行是表头占用了。

然后，我们设置整个表格样式，给表格加上边框，并且居中对齐。

$sql = "SELECT id,name,chinese,maths,english FROM `t_student`";
$stmt = $db->query($sql);
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
$len = count($rows);
$j = 0;
for ($i=0; $i < $len; $i++) {
    $j = $i + 3; //从表格第3行开始
    $worksheet->setCellValueByColumnAndRow(1, $j, $rows[$i]['name']);
    $worksheet->setCellValueByColumnAndRow(2, $j, $rows[$i]['chinese']);
    $worksheet->setCellValueByColumnAndRow(3, $j, $rows[$i]['maths']);
    $worksheet->setCellValueByColumnAndRow(4, $j, $rows[$i]['english']);
    $worksheet->setCellValueByColumnAndRow(5, $j, $rows[$i]['chinese'] + $rows[$i]['maths'] + $rows[$i]['english']);
}

$styleArrayBody = [
    'borders' => [
        'allBorders' => [
            'borderStyle' => \PhpOffice\PhpSpreadsheet\Style\Border::BORDER_THIN,
            'color' => ['argb' => '666666'],
        ],
    ],
    'alignment' => [
        'horizontal' => \PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,
    ],
];
$total_rows = $len + 2;
//添加所有边框/居中
$worksheet->getStyle('A1:E'.$total_rows)->applyFromArray($styleArrayBody);

如果仅是为了满足文章开头说的老板的需求，我们这个时候就可以将数据保存为Excel文件，当然这个Excel文件只保存在服务器上，然后再使用邮件等方式将Excel发送给老板就结了。

但是我们更多的应用场景是用户直接将数据下载导出为Excel表格文件，请接着看：

3.下载保存

最后，我们强制浏览器下载数据并保存为Excel文件。

$filename = '成绩表.xlsx';
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment;filename="'.$filename.'"');
header('Cache-Control: max-age=0');

$writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xlsx');
$writer->save('php://output');

如果你想要保存为.xls文件格式的话，可以改下header代码：

$filename = '成绩表.xlsx';
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="'.$filename.'"');
header('Cache-Control: max-age=0');

$writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'xls');
$writer->save('php://output');

PhpSpreadsheet提供了很多选项设置，接下来的文章我会专门介绍有关生成Excel的设置，如样式：字体、对齐、颜色、行高于列宽，合并与拆分、图片、日期时间、换行、函数使用等等。敬请关注。