PhpSpreadsheet是一个纯PHP类库，使你能够读写Excel、LibreOffic Calc等这样的表格格式。
https://phpspreadsheet.readthedocs.io/en/develop/

坑

列从0开始算，行从1开始算
$sheet->setCellValueByColumnAndRow(0,1,‘特别说明‘);

安装

composer require phpoffice/phpspreadsheet 版本号
默认情况会提示找不到库，上composer找是有的，是因为还没有稳定版，所以要指定版本 1.0.0beta

依赖
The following software is required to develop using PhpSpreadsheet:

• PHP version 5.6 or newer
• PHP extension php_zip enabled
• PHP extension php_xml enabled
• PHP extension php_gd2 enabled (if not compiled in)

默认使用ZipArchive来压缩保存
注意读写权限

简单示例

require ‘vendor/autoload.php‘;

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

$spredsheet = new Spreadsheet();
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue("A1", 'Hello World !');
         
$writer = new Xlsx($spreadsheet);
$writer->save('hello world.xlsx');

默认保存到执行php的根目录，以thinkphp为例index.php在D:\wwwroot\thinkphp\public，那么文件就保存在这
注：如果不想保存到文件，可以传入php://output或php://stdout直接输出（例如html，输出网页）

通过模板来生成文件

全用代码写太累，可以用模板来修改，但是对于动态数据，还是要由代码生成

//通过工厂模式创建内容
        $spreadsheet = \PhpOffice\PhpSpreadsheet\IOFactory::load('template.xlsx');

        $worksheet = $spreadsheet->getActiveSheet();

        $worksheet->getCell('A1')->setValue('John');
        $worksheet->getCell('A2')->setValue('Smith');
        //通过工厂模式来写内容
        $writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xls');
        $writer->save('write.xls');

释放内存

为了防止内存泄露，建议用完手动清理

$spreadsheet->disconnectWorksheets();
unset($spreadsheet);

单元格

根据索引获取英文列

其中A=0
Cell::stringFromColumnIndex($pColumn)

设置值

$worksheet->getCell(‘A1‘)->setValue(‘John‘);
$sheet->setCellValue(‘A1‘, ‘Hello World !‘);
$sheet->setCellValueByColumnAndRow($columnIndex, $rowIndex, $value);

宽度设置

$this->getColumnDimension($columnIndex)->setWidth($width);
还可以让其自适应（不靠谱，建议自行设置）
$sheet->calculateColumnWidths();

直接输出下载

        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="01simple.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‘);

自动计算列宽

  function autoFitColumnWidthToContent($sheet, $fromCol, $toCol) {
        if (empty($toCol) ) {//not defined the last column, set it the max one
            $toCol = $sheet->getColumnDimension($sheet->getHighestColumn())->getColumnIndex();
        }
        for($i = $fromCol; $i <= $toCol; $i++) {
            $sheet->getColumnDimension($i)->setAutoSize(true);
        }
        $sheet->calculateColumnWidths();
    }

函数formula

https://phpspreadsheet.readthedocs.io/en/develop/references/function-list-by-name/
https://phpspreadsheet.readthedocs.io/en/develop/topics/calculation-engine/#function-reference

$worksheet->setCellValue(‘A12‘, ‘=DMIN(A4:E10,"Profit",A1:A2)‘);

$retVal = $worksheet->getCell(‘A12‘)->getCalculatedValue();
// $retVal = 225