这句语句有问题吗，有的话请指出来

Question

session_start();header('cuntent-type:text/html');if(isset($_SESSION['usename']) && $_SESSION['usename']==='lunan'){ exit('已经登录，请勿重复登录') ;}if(isset($_POST['submit'])){ if(isset($_POST['usename'])&&isset($_POST['password'])&&$_POST['usename']==='lunan'&&$_POST['password']==='123'){   $_SESSION['usename']=$_POST['usename'];   header('location:240.php?info=登录成功');  }else{   echo 'cookie设置失败';  } } else{  header('location:241.php?url=240.php&info=abc'); }}

Answer 1

session_start();开启session...

但是你没有结束

session_write_close();//关闭session  起到真实保存   而且防止session阻塞

有开就有关..记住