No employee's last name or department begins with "Z"
Warning: Undefined variable $final in
/var/www/html/directory/alpha.php on line
171
Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in /var/www/html/directory/alpha.php:171
Stack trace:
#0 /var/www/html/directory/alpha.php(171): array_keys()
#1 {main}
thrown in
/var/www/html/directory/alpha.php on line
171