세션ID :

Warning: session_destroy(): Trying to destroy uninitialized session in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 11
session1 :
Warning: Undefined global variable $_SESSION in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 13

Warning: Trying to access array offset on null in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 13

session2 :
Warning: Undefined global variable $_SESSION in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 14

Warning: Trying to access array offset on null in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 14

session3 :
Warning: Undefined global variable $_SESSION in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 15

Warning: Trying to access array offset on null in /users/2018/i1858012/public_html/2019/webprog/ch10/exam10-08.php on line 15

세션설정
세션확인
세션변수 session1 삭제
모든세션변수삭제