接続エラー:PDOException: PDO::__construct(): Error while reading greeting packet. PID=1472 in /var/www/html/bsc_reserve/src/core/db_connect.inc:19 Stack trace: #0 /var/www/html/bsc_reserve/src/core/db_connect.inc(19): PDO->__construct() #1 /var/www/html/bsc_reserve/src/components/head-form.php(26): getDB() #2 /var/www/html/bsc_reserve/src/index.php(5): require_once('...') #3 {main} Next PDOException: SQLSTATE[HY000] [2006] MySQL server has gone away in /var/www/html/bsc_reserve/src/core/db_connect.inc:19 Stack trace: #0 /var/www/html/bsc_reserve/src/core/db_connect.inc(19): PDO->__construct() #1 /var/www/html/bsc_reserve/src/components/head-form.php(26): getDB() #2 /var/www/html/bsc_reserve/src/index.php(5): require_once('...') #3 {main}