Warning: session_start(): open(/var/lib/php/sessions/sess_0tscd93upu6lkb1j4i0btjvp1a, O_RDWR) failed: No space left on device (28) in /users/2018/i1858020/public_html/2019/webprog/ch10/exam10-08.php on line 1

Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /users/2018/i1858020/public_html/2019/webprog/ch10/exam10-08.php on line 1
세션 ID :

Warning: session_destroy(): Trying to destroy uninitialized session in /users/2018/i1858020/public_html/2019/webprog/ch10/exam10-08.php on line 11
session1 :
Warning: Undefined array key "session1" in /users/2018/i1858020/public_html/2019/webprog/ch10/exam10-08.php on line 13

session2 :
Warning: Undefined array key "session2" in /users/2018/i1858020/public_html/2019/webprog/ch10/exam10-08.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2018/i1858020/public_html/2019/webprog/ch10/exam10-08.php on line 15

세션 설정
세션 확인
세션 변수 session1 삭제
모든 세션 변수 삭제