세션 ID : gcvsvv7qchjsk7qinvddv3pohe
session1 :
Warning: Undefined array key "session1" in /users/2019/i1919058/public_html/2022/WebProg/ch10/exam10-05.php on line 10

session2 :
Warning: Undefined array key "session2" in /users/2019/i1919058/public_html/2022/WebProg/ch10/exam10-05.php on line 11

session3 :
Warning: Undefined array key "session3" in /users/2019/i1919058/public_html/2022/WebProg/ch10/exam10-05.php on line 12

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