Fatal error: Uncaught Error: Call to a member function gSQLWhere() on null in /home/ralfapp1/farndatenbank.de/include/buecher_variables.php:18
Stack trace:
#0 /home/ralfapp1/farndatenbank.de/buecher_list.php(16): require_once()
#1 {main}
thrown in /home/ralfapp1/farndatenbank.de/include/buecher_variables.php on line 18