Fatal error: Uncaught ArgumentCountError: mysqli_query() expects at least 2 arguments, 1 given in C:\xampp_ssra\htdocs\list_bbs.php:62 Stack trace: #0 C:\xampp_ssra\htdocs\list_bbs.php(62): mysqli_query('select id from ...') #1 {main} thrown in C:\xampp_ssra\htdocs\list_bbs.php on line 62