データベース接続エラー
#0 /home/r6174770/public_html/link-dc.com/mail/index.php(15): PDO->__construct() #1 {main}
Warning: Undefined variable $db in /home/r6174770/public_html/link-dc.com/mail/index.php on line 23

Fatal error: Uncaught Error: Call to a member function query() on null in /home/r6174770/public_html/link-dc.com/mail/index.php:23 Stack trace: #0 {main} thrown in /home/r6174770/public_html/link-dc.com/mail/index.php on line 23