A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: controllers/Problemas.php

Line Number: 76

Backtrace:

File: /homepages/33/d349327298/htdocs/otraeducacion/matematicas/application/controllers/Problemas.php
Line: 76
Function: _error_handler

File: /homepages/33/d349327298/htdocs/otraeducacion/matematicas/index.php
Line: 317
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: controllers/Problemas.php

Line Number: 78

Backtrace:

File: /homepages/33/d349327298/htdocs/otraeducacion/matematicas/application/controllers/Problemas.php
Line: 78
Function: _error_handler

File: /homepages/33/d349327298/htdocs/otraeducacion/matematicas/index.php
Line: 317
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /homepages/33/d349327298/htdocs/otraeducacion/matematicas/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /homepages/33/d349327298/htdocs/otraeducacion/matematicas/application/controllers/Problemas.php
Line: 78
Function: redirect

File: /homepages/33/d349327298/htdocs/otraeducacion/matematicas/index.php
Line: 317
Function: require_once