세션ID : unbbadkulv0dfsja3rvdhaiedq
session 1 =
Warning: Undefined array key "session1" in /users/2018/i1858038/public_html/2019/webprog/ch10/exam10-05.php on line 10

session 2 =
Warning: Undefined array key "session2" in /users/2018/i1858038/public_html/2019/webprog/ch10/exam10-05.php on line 11

session 3 =
Warning: Undefined array key "session3" in /users/2018/i1858038/public_html/2019/webprog/ch10/exam10-05.php on line 12

세션설정
세션변수 session1 삭제
모든세션변수삭제
세션삭제