Notice: Undefined variable: HTTP_HOST in tools/includes/bd_connect.php on line 2

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in tools/includes/bd_connect.php:15 Stack trace: #0 /services/webpages/l/e/learngenocide.com/public/teacher_registration.php(2): require() #1 {main} thrown in tools/includes/bd_connect.php on line 15