儲存表情需要對應字符集支援

1.mysql支援utf8mb4的版本是5.5.3+

2.修改資料庫配置

[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect='SET NAMES utf8mb4'
default-storage-engine=INNODB
 

3.修改對應資料庫、表、欄位的字符集

ALTER DATABASE database_name CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;
ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE table_name CHANGE column_name VARCHAR(191) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

表中某欄位為可以儲存表情的只需要修改該欄位的字符集即可；

在建立表時，可直接指定字符集

`title` varchar(50) CHARACTER SET utf8mb4 NOT NULL DEFAULT '' COMMENT '標題',