Warning: PDO::__construct() [万博官网app体育]: php_network_getaddresses: getaddrinfo failed: ????????????????? in C:\phpStudy\WWW\core\library\dbpdo.class.php on line 16

Warning: PDO::__construct() [pdo.--construct]: [2002] php_network_getaddresses: getaddrinfo failed: ????????????????? (trying to connect via tcp://localhost:3306) in C:\phpStudy\WWW\core\library\dbpdo.class.php on line 16
数据库连接错误!错误信息:SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: ?????????????????