세션ID : ifss82s2topqgr5lgk1u12f673
session1 :
Warning: Undefined array key "session1" in /users/2000/i0058041/public_html/webprog/Session/unsetSession.php on line 13

session2 :
Warning: Undefined array key "session2" in /users/2000/i0058041/public_html/webprog/Session/unsetSession.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2000/i0058041/public_html/webprog/Session/unsetSession.php on line 15

session1 삭제
모든 세션변수 삭제
세션 삭제