目前我们在PHP中使用以下命令在应用程序中将字符集设置为UTF-8。
因为这有点开销，所以我们希望将其设置为MySQL中的默认设置。我们可以在/etc/my.cnf或其他位置这样做吗?
SET NAMES 'utf8'
SET CHARACTER SET utf8
我在/etc/my.cnf中寻找了一个默认字符集，但那里没有关于字符集的任何内容。
在这一点上，我做了以下设置MySQL字符集和排序变量为UTF-8:
skip-character-set-client-handshake
character_set_client=utf8
character_set_server=utf8
这是正确的处理方式吗?
当前回答
在Xubuntu 12.04下，我简单地添加了
[mysqld]
character_set_server = utf8
到 /etc/mysql/my.cnf
结果是
mysql> show variables like "%character%";show variables like "%collation%";
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
+----------------------+-----------------+
| Variable_name | Value |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database | utf8_general_ci |
| collation_server | utf8_general_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)
也可以看看http://dev.mysql.com/doc/refman/5.6/en/charset-server.html
其他回答
在Fedora 21上
$ vi /etc/my.cnf
添加:
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
[mysqld]
init_connect='SET collation_connection = utf8_unicode_ci'
init_connect='SET NAMES utf8'
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
保存并退出。
最后记住，用service mysqld restart重启服务mysqld。
对于utf8mb4_general_ci
[client]
default-character-set=utf8mb4
[mysql]
default-character-set=utf8mb4
[mysqld]
collation-server = utf8mb4_general_ci
init-connect='SET NAMES utf8mb4'
character-set-server = utf8mb4
根据symfony框架文档https://symfony.com/doc/2.6/book/doctrine.html#configuring-the-database
我们建议不要使用MySQL的utf8字符集，因为它没有 支持4字节unicode字符，包含它们的字符串将是 截断。更新的utf8mb4字符集修复了这个问题。
《NijaCat》也很接近，但却过于夸张:
要将默认值设置为UTF-8，您需要将以下内容添加到my.cnf
[client]
default-character-set=utf8
[mysqld]
default-character-set = utf8
然后，验证:
mysql> show variables like "%character%";show variables like "%collation%";
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
+----------------------+-----------------+
| Variable_name | Value |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database | utf8_general_ci |
| collation_server | utf8_general_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)
如果你对客户端的设置感到困惑，重启mysql服务后conn被重置。试试下面这些步骤(对我很有效):
vi /etc/my.cnf 添加内容:blow和:wq (客户端) character-sets-dir = / usr /地方/ mysql /分享/ mysql /数据集 重启mysql，登录mysql，使用数据库，输入命令状态;，你会发现'client'和'conn'的字符集被设置为'utf8'。
查看参考资料了解更多信息。
指令已更改为character-set-system=utf8
http://dev.mysql.com/doc/refman/5.6/en/charset-configuration.html
