PHP, ODBC, and nvarchar

By  on  

I stumbled upon an odd error using PHP's ODBC functions to query a SQL Server 2005 database. I was doing a basic SELECT statement to get the description of something when I encountered the following error:

Warning: odbc_exec() [function.odbc-exec]: SQL error: [unixODBC][FreeTDS][SQL Server]Unicode data in a Unicode-only collation or ntext data cannot be sent to clients using DB-Library (such as ISQL) or ODBC version 3.7 or earlier., SQL state in SQLExecDirect in /home/web/file.php on line 4

It turns out that the PHP ODBC functions have a hard time pulling "nvarchar" data. Here's the ugly solution to getting nvarchar data:

SELECT CAST(CAST([DetailedDescription] AS VARCHAR(8000)) AS TEXT) AS ad FROM mytable WHERE active = 1

Not pretty but making it function is what counts.

Recent Features

  • By
    Designing for Simplicity

    Before we get started, it's worth me spending a brief moment introducing myself to you. My name is Mark (or @integralist if Twitter happens to be your communication tool of choice) and I currently work for BBC News in London England as a principal engineer/tech...

  • By
    Vibration API

    Many of the new APIs provided to us by browser vendors are more targeted toward the mobile user than the desktop user.  One of those simple APIs the Vibration API.  The Vibration API allows developers to direct the device, using JavaScript, to vibrate in...

Incredible Demos

  • By
    How to Create a Twitter Card

    One of my favorite social APIs was the Open Graph API adopted by Facebook.  Adding just a few META tags to each page allowed links to my article to be styled and presented the way I wanted them to, giving me a bit of control...

  • By
    Scroll IFRAMEs on iOS

    For the longest time, developers were frustrated by elements with overflow not being scrollable within the page of iOS Safari.  For my blog it was particularly frustrating because I display my demos in sandboxed IFRAMEs on top of the article itself, so as to not affect my site's...

Discussion

  1. THANKS!!!
    muchas gracias.. ahora puedo seguir trabajando tranquilo.. justamante estaba teniendo problemas con un campo nvarchar.

  2. umberleigh

    Casting to varchar limits you to 8000 characters in a field.

    I found just casting to text works better, like so:

    print("SELECT CAST([column_name] AS TEXT) AS column_0 FROM table_name");
  3. Thanks , nice solve problem from sql server

  4. San

    Cast did the job ….

    Nice post !!!

  5. mohi

    not work!

    Warning: mssql_query() [function.mssql-query]: message: Incorrect syntax near ‘ASâ’. (severity 15) in /var/www/vhosts/fvc.ir/httpdocs/mssql.php on line 11

  6. Thank you very very much!
    And here is how to write value:
    http://stackoverflow.com/questions/7255703/utf-8-in-sql-server-2008-database-php

    $value = 'ŽČŘĚÝÁÖ';
    $value = iconv('UTF-8', 'UTF-16LE', $value); //convert into native encoding 
    $value = bin2hex($value); //convert into hexadecimal
    $query = 'INSERT INTO some_table (some_nvarchar_field)  VALUES(CONVERT(nvarchar(MAX), 0x'.$value.'))';
    
  7. thanks a lot. i was not shure what was the problem. In the sql management studio the data looks fine and in php is not. my first impresion was user rights for the data .. but after 1 hour of hair pulling :) i wandered if culd be the odbc … and like this i found your post

    thanks again

  8. Riyas

    Thanks for this solution. I was stuck at this problem and finally reached here

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!