A PHP Error was encountered

Severity: 8192

Message: explode(): Passing null to parameter #2 ($string) of type string is deprecated

Filename: default/course_page.php

Line Number: 4

Backtrace:

File: /home2/andlous/public_html/application/views/frontend/default/course_page.php
Line: 4
Function: explode

File: /home2/andlous/public_html/application/views/frontend/default/index.php
Line: 59
Function: include

File: /home2/andlous/public_html/application/third_party/MX/Loader.php
Line: 330
Function: include

File: /home2/andlous/public_html/application/third_party/MX/Loader.php
Line: 281
Function: _ci_load

File: /home2/andlous/public_html/application/controllers/Home.php
Line: 236
Function: view

File: /home2/andlous/public_html/index.php
Line: 321
Function: require_once