A PHP Error was encountered

Severity: 8192

Message: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated

Filename: traits/course_trait.php

Line Number: 20

Backtrace:

File: /www/wwwroot/invisible.crowntw.com/application/traits/course_trait.php
Line: 20
Function: strpos

File: /www/wwwroot/invisible.crowntw.com/application/controllers/Course.php
Line: 66
Function: getDisplay

File: /www/wwwroot/invisible.crowntw.com/application/core/MY_Controller.php
Line: 61
Function: display

File: /www/wwwroot/invisible.crowntw.com/index.php
Line: 320
Function: require_once