Warning: Undefined variable $board_dataURL in /home/gnw1391/www/kor/main/main_event.html on line 12

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/gnw1391/www/kor/main/main_event.html:17 Stack trace: #0 /home/gnw1391/www/kor/main/main_event.html(17): mysqli_query(NULL, 'select idx,titl...') #1 {main} thrown in /home/gnw1391/www/kor/main/main_event.html on line 17