Warning: PDO::__construct(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/html/home/new/common/chanting3api.php on line 8

Warning: PDO::__construct(): [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known (trying to connect via tcp://tszshan-rds-pdt01.cwce91cdq4xb.ap-southeast-1.rds.amazonaws.com:3306) in /var/www/html/home/new/common/chanting3api.php on line 8

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known' in /var/www/html/home/new/common/chanting3api.php:8
Stack trace:
#0 /var/www/html/home/new/common/chanting3api.php(8): PDO->__construct('mysql:host=tszs...', 'tszshanuser', '#EDCft6YHN')
#1 {main}
  thrown in /var/www/html/home/new/common/chanting3api.php on line 8