I find what language the client is using by a link and the link 
will send a parameter "locale" to the, this parameter have three 
values: "en_US"(American english,the charset is "iso-8859-
1"),"zh_CN"(simple chinese,the charset 
is "gb2312" ),"zh_TW"(tradition chinese, the charset 
is "Big5"),the link is like this "<a href="list.php?
locale="zh_CN">,if client click the linke like "<a 
href="list.php?locale="zh_CN">",all of the follow pages will 
send the html head with "charset=gb2312" to the client browser.

All the characters display on the php pages get from the 
database, each piece of data that will be dispay on the page has 
three languane records: english ,Chinese traditional ,and 
Simplified Chinese. if the parameter "locale" from client 
is "en_US" ,so I must get the english characters from the 
database. if the parameters locale is "zh_CN" ,the php pages will 
get the simplified chinese characters from the database, and if 
the parameter "locale" is get from client is "zh_TW" ,so the php 
page page will get the chinese traditional characters from the 
database. The collation of the database is "Chinese_PRC_BIN" .

but when the server is simplified chinese computer, I browse the 
php pages, only can display simplified chinese characters and 
english characters correctly on the page. if I change the server 
to chinese traditional computer, when I browse the php page, 
only can display chinese traditional characters and english 
correctly.

so I want some solutions to solve this problem.