MS SQL server Unicode handling

Hi experts,

I have a web application that needs to support many languages including non latin character sets like, Russian, Chinese & Arabic.  We are using .php and the Yii framework.  Problem is when we write to SQL server even with the nvarchar type set the db columns, they contain ???? instead of the proper characters.  Now, if I use visual studio management studio and cut and paste the Chinese chars in directly they look ok.  

Firstly, what settings do I need to setup the MS SQL server to support UTF-8 and non latin char sets, could I have the TSQL required?
Secondly, why does this go wrong when we write to the db in .php?

Thanks for your help in advance.
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Deepak ChauhanSQL Server DBACommented:
you can try like this.

Insert into table values (N'XYZ')
Ray PaseurCommented:
This is an increasingly common problem as more of the world comes online.  This article sheds some light on it.  There is not any "one easy fix" but if you get all of the settings right, things will work correctly.  The HTML, PHP and database all have to have their character encoding set up correctly.  Your text editor may be in play, especially if you cut-and-paste characters.  Make sure your scripts are stored in UTF-8 encoding.

Unfortunately, Microsoft does not really make it as easy as the other, free and open-source databases...

... but they offer some online guidance.

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