Your wxhiloavg.php has
include_once("hilowavg2.php")
but the script is named hiloavg2.php (no ‘w’ in the name), so change it to
include_once("hiloavg2.php")
BTW… it is working on my test site (PHP 7.2.13) here
Your wxhiloavg.php has
include_once("hilowavg2.php")
but the script is named hiloavg2.php (no ‘w’ in the name), so change it to
include_once("hiloavg2.php")
BTW… it is working on my test site (PHP 7.2.13) here