세션ID : jq9ocs57ttmt47f7slvdf9v4jd
session1 :
Warning: Undefined array key "session1" in /users/2021/i2151025/public_html/2022/WebProg/ch10/exam10-08.php on line 14

session2 :
Warning: Undefined array key "session2" in /users/2021/i2151025/public_html/2022/WebProg/ch10/exam10-08.php on line 15

session3 :
Warning: Undefined array key "session3" in /users/2021/i2151025/public_html/2022/WebProg/ch10/exam10-08.php on line 16

세션설정
세션확인
세션변수 session1 삭제
모든세션변수삭제