smms_law_re/app/Exports/ArrayExport.php

<?php

namespace App\Exports;

use Maatwebsite\Excel\Concerns\FromArray;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithCustomStartCell;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;

class ArrayExport implements FromArray, WithHeadings, WithCustomStartCell
{
    protected $data;
    protected $headings;
    protected $startCell;

    public function __construct(array $data, array $headings = null, string $startCell = 'A1')
    {
        $this->data = $data;
        $this->headings = $headings;
        $this->startCell = $startCell;
    }

    public function array(): array
    {
        return $this->data;
    }

    public function headings(): array
    {
        // 定義標題列
        return $this->headings ?? array_keys($this->data[0]);
    }

    public function startCell(): string
    {
        return $this->startCell ?? 'A1';
    }
}