세션id : 4c7r84s2nt0jtr6l3et9uc9jar
session1 :
Warning: Undefined array key "session1" in /users/2021/i2151054/public_html/2022/WebProg/ch10/exam10-08.php on line 14
session2 :
Warning: Undefined array key "session2" in /users/2021/i2151054/public_html/2022/WebProg/ch10/exam10-08.php on line 15
session3 :
Warning: Undefined array key "session3" in /users/2021/i2151054/public_html/2022/WebProg/ch10/exam10-08.php on line 16
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세션변수 session1 삭제
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