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: /var/www/paginaAlumno/application/controllers/C_instalaciones.php
Line: 9
Function: __construct

File: /var/www/paginaAlumno/index.php
Line: 292
Function: require_once