Fatal error: Uncaught Error: Class 'mysqli' not found in /home/mytraining/public_html/legacy/characterisation/db_connection.inc.php:15 Stack trace: #0 /home/mytraining/public_html/legacy/index.php(43): db_connect() #1 {main} thrown in /home/mytraining/public_html/legacy/characterisation/db_connection.inc.php on line 15