代码贴出~希望能找出小弟我错在什么地方.多谢

代码贴出~~~~~~~~~希望能找出我错在什么地方..谢谢
基础贴

index.php

PHP code

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 <?php session_start();
session_unset();
session_destroy();
session_register("pass");
$password=111;
$HTTP_SESSION_VARS["pass"]=$password;
echo $HTTP_SESSION_VARS["pass"];?> 
<a href="session.php">
请点击第二页面</a> 

session.php

PHP code

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<?php session_start();
$i=$_SESSION['pass'];
if(isset($i))
{
    echo "成功";
    echo $i;
    }
    else
    {
        echo "失败";
        
        }

?>

------解决方案--------------------
去掉这三行：
session_unset(); //这是关闭 session
session_destroy(); //这也是关闭 session
session_register("pass");//这个函数已经失效了
对session赋值用
$_SESSION['pass'] = $password;