解决方法

1、进入数据库，直接运行下列语句：

alter table typecho_comments convert to character set utf8mb4 collate utf8mb4_general_ci;
alter table typecho_contents convert to character set utf8mb4 collate utf8mb4_general_ci;
alter table typecho_fields convert to character set utf8mb4 collate utf8mb4_general_ci;
alter table typecho_metas convert to character set utf8mb4 collate utf8mb4_general_ci;
alter table typecho_options convert to character set utf8mb4 collate utf8mb4_general_ci;
alter table typecho_relationships convert to character set utf8mb4 collate utf8mb4_general_ci;
alter table typecho_users convert to character set utf8mb4 collate utf8mb4_general_ci;

2、修改数据库的配置文件

我们到网站的根目录下找到config.inc.php在文件中我们可以看到如下代码，然后我们将原来的utf8修改为 utf8mb4替换掉保存即可

'charset' => 'utf8mb4', // 将原来的utf8修改为 utf8mb4