If I add error message code to the topof the page:
<?php
error_reporting(E_ALL);
ini_set('display_errors','on');
?>
Then run the form, I get:
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 57
Notice: Undefined variable: WA_AB_Split in C:\xampp\htdocs\skills\registration.php on line 60
Warning: explode() [function.explode]: Empty delimiter in C:\xampp\htdocs\skills\registration.php on line 60
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\skills\registration.php:5) in C:\xampp\htdocs\skills\registration.php on line 73
I trust the above provides enough info to solve it.
Many thanks