<?php
declare (strict_types=1);

namespace app\util;

use PhpOffice\PhpSpreadsheet\IOFactory;

/**
 * @author canny
 * @date 2024/1/17 14:39
 **/
class ExcelUtil
{
    const SUFFIX_XLSX = 'Xlsx';
    const SUFFIX_Xls = 'Xls';

    public static function downloadExcel($newExcel, $filename, $format)
    {
        // $format只能为 Xlsx 或 Xls
        if ($format == 'Xlsx') {
            header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        } elseif ($format == 'Xls') {
            header('Content-Type: application/vnd.ms-excel');
        }

        header("Content-Disposition: attachment;filename="
            . $filename . date('Y-m-d') . '.' . strtolower($format));
        header('Cache-Control: max-age=0');
        $objWriter = IOFactory::createWriter($newExcel, $format);

        $objWriter->save('php://output');

        //通过php保存在本地的时候需要用到
        //$objWriter->save($dir.'/demo.xlsx');

        //以下为需要用到IE时候设置
        // If you're serving to IE 9, then the following may be needed
        //header('Cache-Control: max-age=1');
        // If you're serving to IE over SSL, then the following may be needed
        //header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
        //header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT'); // always modified
        //header('Cache-Control: cache, must-revalidate'); // HTTP/1.1
        //header('Pragma: public'); // HTTP/1.0
        exit;
    }
}