세션ID : ul8nel08ks3670825qink4s0j2
session1 :
Warning: Undefined array key "session1" in /users/2016/i1658009/public_html/2019/webprog/ch10/exam10-08.php on line 12

session2 :
Warning: Undefined array key "session2" in /users/2016/i1658009/public_html/2019/webprog/ch10/exam10-08.php on line 13

session3 :
Warning: Undefined array key "session3" in /users/2016/i1658009/public_html/2019/webprog/ch10/exam10-08.php on line 14

세션설정
세션확인
세션변수 session1 삭제
모든세션변수삭제