再谈Wordpress的MySQL乱码问题解决方法

Posted by lostsnow
12月 27, 2006

在MySQL4.1下，中文的WP就会产生种种的乱码问题。

一个程序（ PHP，CGI 等）与MySQL建立连接后，这个程序发送给MySQL的数据采用的是什么字符集，MySQL 是无从得知的。所以解决乱码问题的根本就是我们在程序中告诉MySQL采用的编码是什么，简单的就是在程序中加入这样的一个语句：

SET NAMES 'utf8';

这个语句的效果等同于同时设定了

SET character_set_client='utf8';
SET character_set_connection='utf8';
SET character_set_results='utf8';

为什么这么做？

我们安装MySQL4.1时按照默认配置，那么default-character-set= utf8。在MySQL Command Line Client下查看到的查看系统的字符集和排序方式的设定为：

mysql> SHOW VARIABLES LIKE ‘character_set_%’;
+————————–+—————————-+
| Variable_name | Value |
+————————–+—————————-+
| character_set_client | latin1 |
| character_set_connection | latin1 |
| character_set_database | utf8 |
| character_set_results | latin1 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+————————–+—————————-+
7 rows in set (0.00 sec)

mysql> SHOW VARIABLES LIKE ‘collation_%’;
+———————-+——————-+
| Variable_name | Value |
+———————-+——————-+
| collation_connection | latin1_swedish_ci |
| collation_database | utf8_general_ci |
| collation_server | utf8_general_ci |
+———————-+——————-+
3 rows in set (0.00 sec)

按照MySQL的存储机制，数据在传输的过程中就会在latin1和utf8两种编码之间互相转换，这样就很容易的变成了乱码。我们在程序中设置了 SET NAMES ‘UTF8′，就等同于把所有的编码都设置为utf8，这样数据就没有了编码转换问题，也就没有了乱码问题了。

在WP中的设置方法

那么具体在WordPress中，怎么设定SET NAMES 'UTF8'呢？

对于PHP的MySQL系统来说，这样的修改很简单：

找到wp-includes/wp-db.php

$this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword);

//加上下面这行

$this->query("SET NAMES 'utf8'");

这样数据在传输和存储的过程中，都不会出现乱码了。

然后把所有表和字段的字符集改成utf8，运行以下语句：

--
-- TABLE
--
 
ALTER TABLE `wp_categories`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_options`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_post2cat`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_postmeta`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_usermeta`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users`  DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_categories
--
 
ALTER TABLE `wp_categories` CHANGE `cat_name` `cat_name` varchar( 55 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_categories` CHANGE `category_nicename` `category_nicename` varchar( 200 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_categories` CHANGE `category_description` `category_description` LONGTEXT CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_comments
--
 
ALTER TABLE `wp_comments` CHANGE `comment_author` `comment_author` tinytext CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_author_email` `comment_author_email` varchar( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_author_url` `comment_author_url`  varchar( 200 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_author_IP` `comment_author_IP`  varchar( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_content` `comment_content` text CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_approved` `comment_approved` ENUM( '0', '1', 'spam' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_agent` `comment_agent` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_comments` CHANGE `comment_type` `comment_type` varchar( 20 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_linkcategories
--
 
ALTER TABLE `wp_linkcategories` CHANGE `cat_name` `cat_name` tinytext CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `auto_toggle` `auto_toggle` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `show_images` `show_images` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `show_description` `show_description` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `show_rating` `show_rating` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `show_updated` `show_updated` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `sort_order` `sort_order` varchar( 64 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `sort_desc` `sort_desc` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `text_before_link` `text_before_link` varchar( 128 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `text_after_link` `text_after_link` varchar( 128 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_linkcategories` CHANGE `text_after_all` `text_after_all` varchar( 128 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_links
--
 
ALTER TABLE `wp_links` CHANGE `link_url` `link_url` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_name` `link_name` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_image` `link_image` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_target` `link_target` varchar( 25 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_description` `link_description` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_visible` `link_visible` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_rel` `link_rel` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_notes` `link_notes` mediumtext CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_links` CHANGE `link_rss` `link_rss` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_options
--
 
ALTER TABLE `wp_options` CHANGE `option_name` `option_name` varchar( 64 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_options` CHANGE `option_can_override` `option_can_override` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_options` CHANGE `option_value` `option_value` longtext CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_options` CHANGE `option_description` `option_description` tinytext CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_options` CHANGE `autoload` `autoload` enum( 'Y', 'N' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_postmeta
--
 
ALTER TABLE `wp_postmeta` CHANGE `meta_key` `meta_key` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_postmeta` CHANGE `meta_value` `meta_value` longtext CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_posts
--
 
ALTER TABLE `wp_posts` CHANGE `post_content` `post_content` longtext CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_title` `post_title` text CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_excerpt` `post_excerpt` text CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_status` `post_status` enum( 'publish', 'draft', 'private', 'static', 'object', 'attachment' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `comment_status` `comment_status` enum( 'open', 'closed', 'registered_only' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `ping_status` `ping_status` enum( 'open', 'closed' ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_password` `post_password` varchar( 20 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_name` `post_name` varchar( 200 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `to_ping` `to_ping` text CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `pinged` `pinged` text CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_content_filtered` `post_content_filtered` text CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `guid` `guid` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_type` `post_type` varchar( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_posts` CHANGE `post_mime_type` `post_mime_type` varchar( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_usermeta
--
 
ALTER TABLE `wp_usermeta` CHANGE `meta_key` `meta_key` varchar( 255 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_usermeta` CHANGE `meta_value` `meta_value` longtext CHARACTER SET utf8 COLLATE utf8_general_ci;
 
--
-- TABLE wp_users
--
 
ALTER TABLE `wp_users` CHANGE `user_login` `user_login` varchar( 60 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users` CHANGE `user_pass` `user_pass` varchar( 64 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users` CHANGE `user_nicename` `user_nicename` varchar( 50 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users` CHANGE `user_email` `user_email` varchar( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users` CHANGE `user_url` `user_url` varchar( 100 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users` CHANGE `user_activation_key` `user_activation_key` varchar( 60 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE `wp_users` CHANGE `display_name` `display_name` varchar( 250 ) CHARACTER SET utf8 COLLATE utf8_general_ci;
Tags: mysql, wordpress, 乱码

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Comments
评论 作者： poshi on 2008-06-18 @ 02:12:28

真的吗？我有一个乱码的问题，有些人在我这里留言有时候会变成乱码，但不是全部。。。我正在寻找解决问题的办法。。。这个，先收藏了先。。。

评论 作者： lostsnow on 2008-06-25 @ 09:35:02

保证数据库
文件格式以及contentType都为utf8
在查询前都加上SET NAMES 'utf8';
不会产生乱码了

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