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MySQL 4.1x 中文乱码问题_MySQL

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Jun 01, 2016 pm 01:53 PM

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　　现在多数host装的还是MySQL 4.0x 版本以下，如果升级到了4.1x 或者移动到使用4.1x 的主机上，估计会遇到一些问题。我在powweb上遇到了两个问题。

　　一是数据导入。在phpMyAdmin内导入后，发现中文变成了乱码。搜索学习后，了解到需要设置数据库的collation (校勘)，如果你的数据库是utf-8的，设置为utf8_general_ci就可以了。

　　二是，即使正确导入了，在phpMyAdmin里也能正确显示，但WordPress页面上显示的文章内容都是“???”，而模板里面的汉字都能正常显示。这让我头疼了很久。搜索到Windix’s Weblog上有对此的说明：

　　从MySQL 4.1开始引入的多语言支持确实很棒，而且一些特性已经超过了其他的数据库系统。不过我在测试过程中发现使用适用于MySQL 4.1之前的PHP语句操作MySQL数据库会造成乱码，即使是设置过了表字符集也是如此。我读了一下新的MySQL在线手册中第十章”Character Set Support“后终于找到了解决方法并测试通过。

　　MySQL 4.1的字符集支持(Character Set Support)有两个方面：字符集(Character set)和排序方式(Collation)。对于字符集的支持细化到四个层次: 服务器(server)，数据库(database)，数据表(table)和连接(connection)。

　　当我们按照原来的方式通过PHP存取MySQL数据库时，就算设置了表的默认字符集为utf8并且通过UTF-8编码发送查询，你会发现存入数据库的仍然是乱码。问题就出在这个connection连接层上。解决方法是在发送查询前执行一下下面这句：

　　SET NAMES ‘utf8′;

　　但是我依旧不知道，如何，在何处让WordPress运行这个SQL语句。后来在阿修的部落格上查到办法：

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