Fatal error: Uncaught Error: Call to a member function gSQLWhere() on null in /home/pugcptdr/public_html/gestion/include/estudiantes_variables.php:18 Stack trace: #0 /home/pugcptdr/public_html/gestion/estudiantes_export.php(10): require_once() #1 {main} thrown in /home/pugcptdr/public_html/gestion/include/estudiantes_variables.php on line 18