A PHP Error was encountered

Severity: 8192

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

Filename: Department/Gallery.php

Line Number: 93

Backtrace:

File: /var/www/html/application/views/Faculty/Department/Gallery.php
Line: 93
Function: explode

File: /var/www/html/application/controllers/Department.php
Line: 278
Function: view

File: /var/www/html/index.php
Line: 315
Function: require_once