sipadu_mbip/app/Exports/CompoundBacklogExport.php

<?php

namespace App\Exports;

use App\Compound;
use Maatwebsite\Excel\Concerns\Exportable;
use Maatwebsite\Excel\Concerns\WithMultipleSheets;

class CompoundBacklogExport implements WithMultipleSheets
{
	use Exportable;

	private $data_, $year_, $com_price_, $com_sheet_;

	public function __construct($data, $year, $com_price, $com_sheet)
    {
        $this->data_ = $data;
        $this->year_ = $year;
        $this->com_price_ = $com_price;
        $this->com_sheet_ = $com_sheet;
    }

    /**
     * @return array
     */
    public function sheets(): array
    {
        $sheets = [];
        $sheets[] = new CompoundBacklogSheet($this->data_, $this->year_, $this->com_price_, $this->com_sheet_);
        return $sheets;
    }
}