workHour/app/Exports/ItemSalaryFTMultipleSheetExport.php

<?php

namespace App\Exports;

use Maatwebsite\Excel\Concerns\WithMultipleSheets;

class ItemSalaryFTMultipleSheetExport implements WithMultipleSheets
{
    protected $monthsData;
    protected $projects;

    /**
     * @param array $monthsData 格式需要包含该月特有的项目列表：
     * [
     * '2024年4月' => [
     * 'projects' => ['RD01', 'RD02'],
     * 'data' => [ [...] ]
     * ],
     * '2024年5月' => [
     * 'projects' => ['RD03'],
     * 'data' => [ [...] ]
     * ]
     * ]
     */
    public function __construct(array $monthsData)
    {
        $this->monthsData = $monthsData;
    }

    public function sheets(): array
    {
        $sheets = [];
        foreach ($this->monthsData as $month => $item) {
            // 每次实例化 Sheet 时，传入该月特有的 projects 列表
            $sheets[] = new ItemSalaryFTSheetExport(
                $month,
                $item['data'],
                $item['projects']
            );
        }
        return $sheets;
    }
}