A PHP Error was encountered

Severity: Notice

Message: ob_clean(): Failed to delete buffer. No buffer to delete

Filename: controllers/Sertifikat.php

Line Number: 570

Backtrace:

File: /home/kemulanc/public_html/bontistudio/application/controllers/Sertifikat.php
Line: 570
Function: ob_clean

File: /home/kemulanc/public_html/bontistudio/index.php
Line: 285
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/kemulanc/public_html/bontistudio/system/core/Exceptions.php:272)

Filename: tcpdf/tcpdf.php

Line Number: 7764

Backtrace:

File: /home/kemulanc/public_html/bontistudio/vendor/tecnickcom/tcpdf/tcpdf.php
Line: 7764
Function: header

File: /home/kemulanc/public_html/bontistudio/application/controllers/Sertifikat.php
Line: 595
Function: Output

File: /home/kemulanc/public_html/bontistudio/index.php
Line: 285
Function: require_once