错误1:数据库地址错误err2:SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known处理方法:检查数据库地址是否填写正确。错误2:数据库连接失败err2:SQLSTATE[HY000] [2002] Connection refused处理方法:检查数据库地址是否填写正确。错误3:数据库连接账号或密码错误err2:SQLSTATE[HY000] [1045] Access