它不起作用的原因是因为您只获取了CustomFormRequest的一个示例。自定义窗体请求只有在容器外解析时才被验证。请改用验证程序：

class SomeClass
{
    public function __construct(private Service $service) {}

    public function call()
    {
        $data = [
            'variable_a' => 'string',
            'variable_b' => true,
        ];

        $validator = \Illuminate\Support\Facades\Validator::make(
            $data,
            [
                'variable_a' => 'required|string',
                'variable_b' => 'required|boolean',
            ]
        );

        // You'll probably want to check $validator->passes() / $validator->fails()
        // before moving on.

        $return_data = $this->service->project($validator->validated());
    }
}

我假设此时没有理由将CustomFormRequest的示例传递给project()，因为数据已经过验证。只需更新类型：

public function project(array $request)
    {
        // do whatever you need to do with the array
    }