세션 ID : 5rcku48pft42ujre1o1fdt3hej
session1 :
Warning: Undefined array key "session1" in /users/2019/i1919011/public_html/2022/WebProg/ch10/exam10-07.php on line 13

session2 :
Warning: Undefined array key "session2" in /users/2019/i1919011/public_html/2022/WebProg/ch10/exam10-07.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2019/i1919011/public_html/2022/WebProg/ch10/exam10-07.php on line 15

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