Warning: Undefined variable $connection in /home/httpd/vhosts/carrom.ch/httpdocs/php/RanglisteEurocupEinzel.php on line 5

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/httpd/vhosts/carrom.ch/httpdocs/php/eurocup_database.php:70
Stack trace:
#0 /home/httpd/vhosts/carrom.ch/httpdocs/php/eurocup_database.php(70): mysqli_query(NULL, 'SET character_s...')
#1 /home/httpd/vhosts/carrom.ch/httpdocs/php/RanglisteEurocupEinzel.php(5): eurocupRender(NULL, 2004, 'Einzel')
#2 {main}
  thrown in /home/httpd/vhosts/carrom.ch/httpdocs/php/eurocup_database.php on line 70