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tp6安装、封装phpspreadsheet
1、安装phpspreadsheet composer require phpoffice/phpspreadsheet 2、封装类 <?php namespace excel; use PHPExcel_IOFactory; use PhpOffice\PhpSpreadsheet\IOFactory; use PhpOffice\PhpSpreadsheet\Spreadsheet; use PhpOffice\PhpSpreadsheet\Style\Alignment