dlh_test_server/app/api/validate/LocalStoreGoodsValidate.php

<?php
namespace app\api\validate;

use think\Validate;

class LocalStoreGoods extends Validate
{
    protected $rule = [
        'lstore_id' => 'require',
        'title' => 'require',
        'price' => 'require|checkPrice',
        'url' => 'require'
    ];

    protected $message = [
        'lstore_id.require' => '商家ID不能为空',
        'title.require' => '商品名称不能为空',
        'url.require' => '商品图片不能为空',
    ];

    protected $scene = [
        'add' => ['lstore_id', 'title', 'price', 'url'],
    ];

    public function checkPrice($value)
    {
        $pattern = '/^\d+(\.\d{1,2})?$/';
        if (!preg_match($pattern, $value)) {
            return "价格或金额格式不正确";
        }
        return true;
    }
}