Warning: Undefined variable $mysqli in /customers/d/7/a/bsdevogelzang.be/httpd.www/foto-album/include/dblayer/functions_mysqli.inc.php on line 76

Fatal error: Uncaught Error: Call to a member function query() on null in /customers/d/7/a/bsdevogelzang.be/httpd.www/foto-album/include/dblayer/functions_mysqli.inc.php:76
Stack trace:
#0 /customers/d/7/a/bsdevogelzang.be/httpd.www/foto-album/include/common.inc.php(89): include()
#1 /customers/d/7/a/bsdevogelzang.be/httpd.www/foto-album/picture.php(10): include_once('/customers/d/7/...')
#2 {main}
  thrown in /customers/d/7/a/bsdevogelzang.be/httpd.www/foto-album/include/dblayer/functions_mysqli.inc.php on line 76