세션ID : 00f5kqpq1s2sv5mqf5286gfntj
session1 :
Warning: Undefined array key "session1" in /users/2018/i1858071/public_html/2019/webprog/ch10/exam10-07.php on line 13

session2 :
Warning: Undefined array key "session2" in /users/2018/i1858071/public_html/2019/webprog/ch10/exam10-07.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2018/i1858071/public_html/2019/webprog/ch10/exam10-07.php on line 15

세션설정
세션확인
세션변수 session1 삭제
세션삭제