세션ID : irg067s3rqb5u2db0hmuvqiemh
session1 :
Warning: Undefined array key "session1" in /users/2016/i1658050/public_html/2019/webprog/ch10/exam10-05.php on line 11

session2 :
Warning: Undefined array key "session2" in /users/2016/i1658050/public_html/2019/webprog/ch10/exam10-05.php on line 12

session3 :
Warning: Undefined array key "session3" in /users/2016/i1658050/public_html/2019/webprog/ch10/exam10-05.php on line 13

세션확인
세션변수 session1 삭제
모든세션변수삭제
세션삭제