A PHP Error was encountered

Severity: 8192

Message: base64_decode(): Passing null to parameter #1 ($string) of type string is deprecated

Filename: controllers/Student.php

Line Number: 530

Backtrace:

File: /home/uochedu/public_html/admission/application/controllers/Student.php
Line: 530
Function: base64_decode

File: /home/uochedu/public_html/admission/index.php
Line: 315
Function: require_once