Fatal error
: Uncaught Error: Undefined constant "i" in /users/2018/i1858048/public_html/2019/webprog/ch06/test06-01.php:15 Stack trace: #0 {main} thrown in
/users/2018/i1858048/public_html/2019/webprog/ch06/test06-01.php
on line
15