Fatal error: Uncaught Error: Call to undefined function MySQL_Query() in /var/www/znaiemomatematyku.org/webroot/exercise/exerciseHeaderItemBased.php:60
Stack trace:
#0 /var/www/znaiemomatematyku.org/webroot/exercise/kalkulacka.php(2): include()
#1 /var/www/znaiemomatematyku.org/webroot/index.php(179): include('...')
#2 {main}
thrown in /var/www/znaiemomatematyku.org/webroot/exercise/exerciseHeaderItemBased.php on line 60