odbc_binmode

For Sybase users (this probably applies to MS-SQL Server as well) who are using ODBC:

I was using the same code as mizmerize, but I was getting truncated data back from the server (at the 32kb mark) when selecting data with the image datatype. My Sybase server has a @@textsize property of 2Gb, which should be plenty. But apparently, the php ODBC driver resets this to 32Kb when a connection is made, and then sets it back to 2Gb after. The solution is to do a query:

<?php odbc_exec($connH, "set textsize 131072"); ?>

immediately before your main query, in mizmerize's code. That should override the default setting.

I am currently using an SQL Server 2000 used as a datasource for ODBC access, Testing PHP scripts from an Apache 2 server running on Windows 2000.I was trying to get an image from the database using ODBC but the output always flushes automatically while I was just getting the result using odbc_result() function.With this code, the picture automatically prints to the browser as soon as I hit odbc_result() (probably a bug, but bug reports aren't that easy to do).<?php  $connH=odbc_pconnect("ImageDB","sa","",SQL_CUR_USE_IF_NEEDED) or die(odbc_errormsg());    $result=odbc_exec($connH, "SELECT Emp_Image FROM tblEmployeePics WHERE Emp_Id=547");    if ($result) {                                    odbc_longreadlen($result, 131072);                odbc_binmode($result,ODBC_BINMODE_PASSTHRU);                            //upon calling this, the output flushes out to the browser... made me scratch        $m_FValue=odbc_result($result, 1);}?>...after 48 hours of scratching I finally made a work around, but by using a function in the bin2hex() function documentation...<?php      function hex2bin($data){        $len = strlen($data);        return pack("H" . $len, $data);     }         $connH=odbc_pconnect("ImageDB","sa","",SQL_CUR_USE_IF_NEEDED) or die(odbc_errormsg());    $result=odbc_exec($connH, "SELECT Emp_Image FROM tblEmployeePics WHERE Emp_Id=547");    if ($result) {                                    odbc_longreadlen($result, 131072);                odbc_binmode($result,ODBC_BINMODE_CONVERT);                                    $m_FValue=odbc_result($result, 1);        $out=hex2bin($m_FValue);    }?>The trick was to convert the output into hex by changing odbc_binmode to  ODBC_BINMODE_CONVERT and using a handy function to convert it back to binary in order to facilitate manipulation of its size, depth etc...

Example: retrieve image from database.<?php   $Link_ID = odbc_connect("DSN", "user", "pass");    $Query_ID = odbc_exec($Link_ID, "SELECT picture FROM categories");    // change to ODBC_BINMODE_CONVERT for comparison    odbc_binmode($Query_ID, ODBC_BINMODE_RETURN);   $Images = odbc_result($Query_ID, 1);   echo $Images;?>

I set the odbc_longreadlen() at the beggining of my script so nText field types dont get truncated, like this:

<?php odbc_longreadlen (0, 1000000); ?>