Description:
------------
Environment:
Windows Server 2003 EE
MS SQL server 8.0.818 (MSDE 2000)
PHP 5.2.6(or high) as ISAPI or cli

I have a table 'session':
       [id] [char](32) NOT NULL DEFAULT (''),
       [expiry] [bigint] NOT NULL DEFAULT ('0'),
       [data] [ntext] NOT NULL DEFAULT ('')
When I retrive data from table and size of data more then 255 bytes, I found symbol with code 0(as EOL for strings) in the 255 position of the string.



Reproduce code:
---------------
<?php
    $dbname = "session_db";
    $username = "sa";
    $pw = "1q2w3e";
    $pdo = new PDO ("odbc:session_db","sa","1q2w3e");

    $query = $pdo->query("delete from session");
    $string = '--';	
    $string .= '123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890';
    $string .= '--';	

    echo 'Length of source string: '.strlen($string)."\n";

    $query = $pdo->query("insert into session values('".md5(time())."', ".time().", '".$string."')");
    var_dump($query);
    
    $rowset = $pdo->query("select * from session");
    if($rowset === false) {
	var_dump($pdo->errorInfo());
    }

    var_dump($rowset);
    $string = $rowset->fetchAll();
    //$string = $rowset->fetchColumn(2);
    var_dump($string); 	
    echo 'Length of target string: '.strlen($string[0][2])."\n";
?>

Expected result:
----------------
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890

Actual result:
--------------
1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123_45678901234567890123456789012345678901234567890