baoshi-was/app/Services/OracleDOCOrderHeaderService.php

<?php

namespace App\Services;

use App\OracleDOCOrderHeader;

Class OracleDOCOrderHeaderService
{

    function first(array $params){
        $order = OracleDOCOrderHeader::query();
        foreach ($params as $column => $value){
            $order->where($column, $value);
        }
        return $order->first();
    }
}