Severity: Notice
Message: Undefined index: p_class_student_v
Filename: controllers/Student.php
Line Number: 86
Backtrace:
File: /var/www/vhosts/res-test.osms.edu.vn/httpdocs/application/controllers/Student.php
Line: 86
Function: _error_handler
File: /var/www/vhosts/res-test.osms.edu.vn/httpdocs/index.php
Line: 257
Function: require_once