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Warning: mysqli_connect(): (HY000/2002): 대상 컴퓨터에서 연결을 거부했으므로 연결하지 못했습니다 in C:\homepage\board_write_ok.php on line 7

Fatal error: Uncaught TypeError: mysqli_set_charset(): Argument #1 ($mysql) must be of type mysqli, bool given in C:\homepage\board_write_ok.php:8 Stack trace: #0 C:\homepage\board_write_ok.php(8): mysqli_set_charset(false, 'utf8') #1 {main} thrown in C:\homepage\board_write_ok.php on line 8