Popular:
 Building Resilient Systems on AWS: Learn how to design and implement a resilient, highly available, fault-tolerant infrastructure on AWS.

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.

Request Metrics real user monitoring
Request Metrics real user monitoring
Request Metrics real user monitoring
Request Metrics real user monitoring

Recent Features

Incredible Demos

  • By
    Camera and Video Control with HTML5

    Client-side APIs on mobile and desktop devices are quickly providing the same APIs.  Of course our mobile devices got access to some of these APIs first, but those APIs are slowly making their way to the desktop.  One of those APIs is the getUserMedia API...

  • By
    Event Delegation with MooTools

    Events play a huge role in JavaScript. I can't name one website I've created in the past two years that hasn't used JavaScript event handling on some level. Ask yourself: how often do I inject elements into the DOM and not add an...

Discussion

  1. David

    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. andy

    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. OZ

    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. Radu

    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!