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year :
Fatal error: Uncaught Error: Undefined constant "year" in /users/2021/i2151035/public_html/2022/WebProg/ch06/test06-01.php:14 Stack trace: #0 {main} thrown in /users/2021/i2151035/public_html/2022/WebProg/ch06/test06-01.php on line 14