A PHP Error was encountered

Severity: Notice

Message: Undefined variable: libros

Filename: views/main_biblioteca.php

Line Number: 75

Backtrace:

File: /var/www/vhosts/iescelia.org/httpdocs/cep-almeria/application/views/main_biblioteca.php
Line: 75
Function: _error_handler

File: /var/www/vhosts/iescelia.org/httpdocs/cep-almeria/application/views/main_template.php
Line: 15
Function: include

File: /var/www/vhosts/iescelia.org/httpdocs/cep-almeria/application/controllers/Biblioteca.php
Line: 160
Function: view

File: /var/www/vhosts/iescelia.org/httpdocs/cep-almeria/index.php
Line: 326
Function: require_once