세션ID :
session1 :
Warning: Undefined global variable $_SESSION in /users/2017/i1758068/public_html/2019/webprog/ch10/exam10-05.php on line 10

Warning: Trying to access array offset on null in /users/2017/i1758068/public_html/2019/webprog/ch10/exam10-05.php on line 10

session2 :
Warning: Undefined global variable $_SESSION in /users/2017/i1758068/public_html/2019/webprog/ch10/exam10-05.php on line 11

Warning: Trying to access array offset on null in /users/2017/i1758068/public_html/2019/webprog/ch10/exam10-05.php on line 11

session3 :
Warning: Undefined global variable $_SESSION in /users/2017/i1758068/public_html/2019/webprog/ch10/exam10-05.php on line 12

Warning: Trying to access array offset on null in /users/2017/i1758068/public_html/2019/webprog/ch10/exam10-05.php on line 12

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