세션ID : 8garnm033o65e08itf6sc3mdpl
session1 :
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session2 :
Warning: Undefined array key "session2" in /users/2021/i2151056/public_html/2022/WebProg/ch10/exam10-07.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2021/i2151056/public_html/2022/WebProg/ch10/exam10-07.php on line 15

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