Warning: session_start(): open(/var/lib/php/sessions/sess_iet5fl43q1e1rdlpt15129plb2, O_RDWR) failed: No space left on device (28) in /users/2021/i2151021/public_html/2022/WebProg/ch10/exam10-08.php on line 1

Warning: session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in /users/2021/i2151021/public_html/2022/WebProg/ch10/exam10-08.php on line 1
세션ID:

Warning: session_destroy(): Trying to destroy uninitialized session in /users/2021/i2151021/public_html/2022/WebProg/ch10/exam10-08.php on line 13
session1:
Warning: Undefined array key "session1" in /users/2021/i2151021/public_html/2022/WebProg/ch10/exam10-08.php on line 16

session2:
Warning: Undefined array key "session2" in /users/2021/i2151021/public_html/2022/WebProg/ch10/exam10-08.php on line 17

session3:
Warning: Undefined array key "session3" in /users/2021/i2151021/public_html/2022/WebProg/ch10/exam10-08.php on line 18

세션설정
세션확인
세션변수 session1 삭제
모든 세션변수 삭제