세션 ID : 9dramjkd79mgha08u0kkrjt3jh
session1 :
Warning: Undefined array key "session1" in /users/2021/i2151058/public_html/2022/WebProg/ch10/exam10-08.php on line 13

session2 :
Warning: Undefined array key "session2" in /users/2021/i2151058/public_html/2022/WebProg/ch10/exam10-08.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2021/i2151058/public_html/2022/WebProg/ch10/exam10-08.php on line 15

>세션설정
>세션확인
>세션변수 session1 삭제
>모든세션변수삭제