Debug backtrace:
	@ mysql.php:32 -- debug_bt()
	@ mysql.php:50 -- db_check_error(...)
	@ allg.php:97 -- db_query(...)
	@ index.php:30 -- getAllgAr()

Debug backtrace:
	@ mysql.php:32 -- debug_bt()
	@ mysql.php:50 -- db_check_error(...)
	@ user.php:66 -- db_query(...)
	@ user.php:16 -- user_key_in_db()
	@ user.php:7 -- user_auth()
	@ index.php:32 -- user_identification()