#0  CheckInt(tarieven) called at [/usr/share/mooiesite4.0/incl/lib/functions/core.php:1057]
#1  GetPage(tarieven) called at [/usr/share/mooiesite4.0/incl/incl_index.php:60]
#2  include_once(/usr/share/mooiesite4.0/incl/incl_index.php) called at [/var/www/vhosts/actonvirtues.nl/httpdocs/index.php:1]
"tarieven" is not numeric