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Fatal error: Uncaught TypeError: Unsupported operand types: int + string in /users/2018/i1858071/public_html/2019/webprog/ch06/test06-02.php:19 Stack trace: #0 {main} thrown in /users/2018/i1858071/public_html/2019/webprog/ch06/test06-02.php on line 19