Warning: require_once(def.php): failed to open stream: No such file or directory in /home/holypubl/public_html/MySQL/SQLStatement.class.php on line 3

Fatal error: require_once(): Failed opening required 'def.php' (include_path='.:/opt/php54/lib/php') in /home/holypubl/public_html/MySQL/SQLStatement.class.php on line 3