wx.sstbc.com/app/Exports/BaseFormExport.php

<?php

namespace App\Exports;

use App\Models\CustomFormField;
use Illuminate\Support\Collection;
use Maatwebsite\Excel\Concerns\FromCollection;

class BaseFormExport implements FromCollection
{
    public $fields;
    public $data;

    public function __construct($exportFields, $data)
    {
        $this->fields = $this->checkFields($exportFields);
        $this->data = $data;
    }


    /**
     * 检测导出字段合法性
     * @param array $exportFields
     * @return array|mixed
     */
    public function checkFields($exportFields = [])
    {
        // 获取所有数据表字段
        $table_name = request('table_name');
        $rowTableFields = (new CustomFormField())->getRowTableFieldsByComment($table_name);
        // 获取交集，则是需要导出的字段
        if (!empty($exportFields)) {
            foreach ($rowTableFields as $key => $item) {
                if (!in_array($key, $exportFields)) {
                    unset($rowTableFields[$key]);
                }
            }
        }
        return $rowTableFields;
    }

    //数组转集合
    public function collection()
    {
        return new Collection($this->createData());
    }

    //业务代码
    public function createData()
    {
        // 表头
        $header = array_values($this->fields);
        $newList = [];
        foreach ($this->data as $key => $info) {
            foreach ($this->fields as $k => $v) {
                $newList[$key][$k] = ($info->$k) ?? '';
            }
        }
        array_unshift($newList, $header); //插入表头
        return $newList;
    }
}