允许laravel根据字段类型过滤请求

class RequestFilter
{
    public function filter($request, $fields)
    {
        foreach ($fields as $field => $type) {
            if ($request->has($field)) {
                $value = $request->input($field);
                switch ($type) {
                    case 'string':
                        $request->merge([$field => filter_var($value, FILTER_SANITIZE_STRING)]);
                        break;
                    case 'integer':
                        $request->merge([$field => filter_var($value, FILTER_SANITIZE_NUMBER_INT)]);
                        break;
                    case 'float':
                        $request->merge([$field => filter_var($value, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION)]);
                        break;
                    // 添加其他字段类型的过滤逻辑
                }
            }
        }
    }
}

class UserController extends Controller
{
    public function index(Request $request)
    {
        $filter = new RequestFilter();
        $filter->filter($request, [
            'name' => 'string',
            'age' => 'integer',
            'salary' => 'float',
            // 添加其他字段及其类型
        ]);

        // 处理过滤后的请求
        // ...
    }
}