【已解答】更新宝塔后网站打不开Error establishing a database co...

为了能快速了解并处理您的问题，请提供以下基础信息：

面板、插件版本：MySQL 5.6.50

系统版本：Cent O S 7

问题描述：Error establishing a database connection

This either means that the username and password information in your wp-config.php file is incorrect or that contact with the database server at localhost could not be established. This could mean your host’s database server is down.

• Are you sure you have the correct username and password?
• Are you sure you have typed the correct hostname?
• Are you sure the database server is running?
  

If you are unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress support forums.

  

相关截图（日志、错误）：

您好，如果出现"Error establishing a database connection" 错误，这表示的 WordPress 网站无法连接到数据库。
以下是修复该错误的一些步骤：
1. 检查 wp-config.php 文件： 打开 wp-config.php 文件，并确保以下值与你的 MySQL 数据库配置都正确：数据库名称、用户名 、密码和主机名。如果其中任何一个设置不正确，你可能需要手动更正它。
2. 检查 MySQL 服务器是否运行： 确认你的 MySQL 服务器正在运行并已启动。