A PHP Error was encountered

Severity: Notice

Message: Undefined index: select

Filename: views/result_html.php

Line Number: 228

Backtrace:

File: /home/u924892185/domains/diff-bt.com/public_html/application/views/result_html.php
Line: 228
Function: _error_handler

File: /home/u924892185/domains/diff-bt.com/public_html/application/controllers/Results.php
Line: 86
Function: view

File: /home/u924892185/domains/diff-bt.com/public_html/index.php
Line: 315
Function: require_once