A PHP Error was encountered

Severity: 8192

Message: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`

Filename: helpers/url_helper.php

Line Number: 162

Backtrace:

File: C:\http\teaching\javascript.klab.tw\application\controllers\Pages.php
Line: 7
Function: helper

File: C:\http\teaching\javascript.klab.tw\index.php
Line: 292
Function: require_once