thinkphp lock의 사용법과 예시를 소개합니다.

class Index extends Controller
{
    public function index()
    {

        $model=Db::name('test');
        $model->startTrans();
        try{
            $list=$model->lock(true)->find();
            $model->where(['id'=>1])->data(['num'=>900])->update();//id为1的更新
            sleep(10);//等待10秒
            $model->commit();
            print_r($list);
        }catch (\Exception $exception){
            $model->rollback();
            throw $exception;

        }




    }


    public function index2(){

        $model=Db::name('test');
        $model->startTrans();
        try{
            $list=$model->lock(true)->where(['id'=>1])->find();//id为1在更新时，select id=1 会等待。把ID改为2时，不等待
            $model->commit();
            print_r($list);
        }catch (\Exception $exception){
            $model->rollback();
            throw $exception;

        }

    }
}